NEET 2015 Code A - Mock Test

$2,3$ -Dimethyl-$2$ -butene can be prepared by heating which of the following compounds with a strong acid?

Gadolinium belongs to the $4f$ series. Its atomic number is $64$. Which of the following is the correct electronic configuration of gadolinium?

The formation of the oxide ion, ${\text{O}}^{2-}(g)$, from oxygen atom requires first an exothermic and then an endothermic step as shown below:$\text{O}(g)+e^{-}⟶{\text{O}}^{-}(g);{\Delta }_f{H}^{\ominus }=-141{\text{kJ mol}}^{-1}$${\text{O}}^{-}(g)+e^{-}⟶{\text{O}}^{2-}(g);{\Delta }_f{H}^{\ominus }=+780{\text{kJ mol}}^{-1}$ Thus the process of formation of ${\text{O}}^{2-}$ in gas phase is unfavourable though ${\text{O}}^{2-}$ is isoelectronic with neon. It is due to the fact that:

The number of structural isomers possible from the molecular formula ${\text{C}}_3{\text{H}}_9\text{N}$ is:

If the equilibrium constant for ${\text{N}}_2(g)+{\text{O}}_2(g)\rightleftharpoons 2\text{NO}(g)$ is $K$, the equilibrium constant for $\frac{1}{2}{\text{N}}_2(g)+\frac{1}{2}{\text{O}}_2(g)\rightleftharpoons \text{NO}(g)$ will be:

Which one of the following pairs of solution is not an acidic buffer?

Aqueous solution of which of the following compounds is the best conductor of electric current?

Caprolactum is used for the manufacture of:

On heating which of the following releases ${\text{CO}}_2$ most easily?

Strong reducing behaviour of ${\text{H}}_3{\text{PO}}_2$ is due to:

Decreasing order of stability of ${\text{O}}_2,{\text{O}}_2^{-},{\text{O}}_2^{+}$ and ${\text{O}}_2^{2-}$ is:

The number of water molecules is maximum in:

In which of the following pairs, both the species are not isostructural?

In the reaction with $\text{HCl}$, an alkene reacts in accordance with the Markovnikov’s rule, to give a product $1$ -chloro-$1$ -methylcyclohexane. The possible starting alkene is:

Assuming complete ionization, same moles of which of the following compounds will require the least amount of acidified ${\text{KMnO}}_4$ for complete oxidation?

Reaction of phenol with chloroform in presence of dilute sodium hydroxide finally introduces which one of the following functional groups?

The vacant space in bcc lattice unit cell is:

Which of the statements given below is incorrect?

The name of complex ion, $[\text{Fe}(\text{CN}{)}_6{]}^{3-}$ is:

If Avogadro number $N_A$, is changed from $6.022\times 10^{23}{\text{mol}}^{-1}$ to $6.022\times 10^{20}{\text{mol}}^{-1}$, this would change:

Which of the following statements is not correct for a nucleophile?

A gas such as carbon monoxide would be most likely to obey the ideal gas law at:

The hybridization involved in complex $[\text{Ni}(\text{CN}{)}_4{]}^{2-}$ is: (Atomic number of $\text{Ni}=28$)

The heat of combustion of carbon to ${\text{CO}}_2$ is $-393.5\text{kJ/mol}$. The heat released upon formation of $35.2\text{g}$ of ${\text{CO}}_2$ from carbon and oxygen gas is:

$20.0\text{g}$ of a magnesium carbonate sample decomposes on heating to give carbon dioxide and $8.0\text{g}$ magnesium oxide. What will be the percentage purity of magnesium carbonate in the sample? (Atomic weight: $\text{Mg}=24$, $\text{C}=12$, $\text{O}=16$)

What is the mole fraction of the solute in a $1.00m$ aqueous solution?

The correct statement regarding defects in crystalline solids is:

The stability of $+1$ oxidation state among $\text{Al, Ga, In}$ and $\text{Tl}$ increases in the sequence:

Two possible stereo-structures of ${\text{CH}}_3\text{CHOH}\cdot \text{COOH}$, which are optically active, are called:

The benzoylation of aniline in the presence of $\text{NaOH}$ to form Benzanilide is known by the name:

The sum of coordination number and oxidation number of metal $\text{M}$ in the complex $[\text{M}(en{)}_2({\text{C}}_2{\text{O}}_4)]\text{Cl}$ (Where $en$ is ethylenediamine) is:

Reaction of a carbonyl compound with one of the following reagents involves nucleophilic addition followed by elimination of water. The reagent is:

Which one of the following esters gets hydrolyzed most easily under alkaline conditions?

In an $S_{N}1$ reaction on chiral centres, there is:

The rate constant of the reaction $\text{A}⟶\text{B}$ is $0.6\times 10^{-3}\text{mole per second}$. If the concentration of $\text{A}$ is $5\text{M}$, then concentration of $\text{B}$ after $20$ minutes is:

What is the pH of the resulting solution when equal volumes of $0.1\text{M NaOH}$ and $0.01\text{M HCl}$ are mixed?

Number of possible isomers for the complex $[\text{Co}(en{)}_2{\text{Cl}}_2]\text{Cl}$ will be: ($en$ = ethylene diamine)

The variation of the boiling points of the hydrogen halides is in the order $\text{HF}>\text{HI}>\text{HBr}>\text{HCl}$. What explains the higher boiling point of hydrogen fluoride?

What is the mass of the precipitate formed when $50\text{mL}$ of $16.9\%$ solution of ${\text{AgNO}}_3$ is mixed with $50\text{mL}$ of $5.8\%$ $\text{NaCl}$ solution?

The oxidation of benzene by ${\text{V}}_2{\text{O}}_5$ in the presence of air at high temperature produces:

Which of the following is not the product of dehydration of $1$ -methylcyclohexanol?

Method by which Aniline cannot be prepared is:

Which of the following reaction(s) can be used for the preparation of alkyl halides?(i) ${\text{CH}}_3{\text{CH}}_2\text{OH}+\text{HCl}\stackrel{{\text{Anhyd. ZnCl}}_2}{\to }$ (ii) ${\text{CH}}_3{\text{CH}}_2\text{OH}+\text{HCl}⟶$ (iii) $({\text{CH}}_3{)}_3\text{COH}+\text{HCl}⟶$ (iv) $({\text{CH}}_3{)}_2\text{CHOH}+\text{HCl}\stackrel{{\text{Anhyd. ZnCl}}_2}{\to }$

Which is the correct order of increasing energy of the listed orbitals in the atom of titanium? (At. No. $Z=22$)

In the extraction of copper from its sulphide ore, the metal is finally obtained by the reduction of cuprous oxide with:

Root pressure is usually developed due to:

Which one is a wrong statement?

Which of the following structures is not found in prokaryotic cells?

Which one of the following animals has two separate circulatory pathways?

Most animals that live in deep oceanic waters are:

An association of individuals of different species living in the same habitat and having functional interactions is:

The oxygen evolved during photosynthesis comes from water molecules. Which one of the following pairs of elements is involved in this reaction?

Axile placentation is present in:

In which of the following both pairs have correct combination?

In mammalian eye, the ‘fovea’ is the center of the visual field, where:

Choose the wrong statement:

Which of the following are not membrane-bound?

In which of the following interactions both partners are adversely affected?

A colour blind man marries a woman with normal sight who has no history of colour blindness in her family. What is the probability of their grandson being colour blind?

Ectopic pregnancies are referred to as:

Cellular organelles with membranes are:

Cell wall is absent in:

The term ‘’linkage’’ was coined by:

Which of the following biomolecules does have a phosphodiester bond?

The primary dentition in human differs from permanent dentition in not having one of the following type of teeth:

A protoplast is a cell:

In which group of organisms the cells walls form two thin overlapping shells which fit together?

The DNA molecules to which the gene of interest is integrated for cloning is called:

Male gametophyte in angiosperms produces:

Coconut water from a tender coconut is:

The species confined to a particular region and not found elsewhere is termed as:

Metagenesis refers to:

The enzymes that is not present in succus entericus is:

Eutrophication of water bodies leading to killing of fishes is mainly due to non-availability of:

The function of the gap junction is to:

Match the following list of microbes and their importance:(a) Saccharomyces cerevisiae — (i) Production of immunosuppressive agents(b) Monascus purpureus — (ii) Ripening of Swiss cheese(c) Trichoderma polysporum — (iii) Commercial production of ethanol(d) Propionibacterium shermanii — (iv) Production of blood-cholesterol lowering agents

Arrange the following events of meiosis in correct sequence:(a) Crossing over, (b) Synapsis, (c) Terminalisation of chiasmata, (d) Disappearance of nucleolus

The cutting of DNA at specific locations became possible with the discovery of:

During biological nitrogen fixation, inactivation of nitrogenase by oxygen poisoning is prevented by:

Grafted kidney may be rejected in a patient due to:

The body cells in cockroach discharge their nitrogenous waste in the haemolymph mainly in the form of:

Filiform apparatus is characteristic feature of:

Acid rain is caused by increase in the atmospheric concentration of:

The wheat grain has an embryo with one large, shield-shaped cotyledon known as:

Among china rose, mustard, brinjal, potato, guava, cucumber, onion and tulip, how many plants have superior ovary?

Which of the following is not a function of the skeletal system?

Golden rice is a genetically modified crop plant where the incorporated gene is meant for biosynthesis of:

Chromatophores take part in:

Select the wrong statement:

A pleiotropic gene:

Human urine is usually acidic because:

Auxin can be bioassayed by:

Which of the following events is not associated with ovulation in human female?

Body having meshwork of cells, internal cavities lined with food filtering flagellated cells and indirect development are the characteristics of phylum:

Which one of the following hormones is not involved in sugar metabolism?

Which of the following diseases is caused by a protozoan?

Outbreeding is an important strategy of animal husbandry because it:

A childless couple can be assisted to have a child through a technique called GIFT. The full form of this technique is:

A jawless fish, which lays eggs in fresh water and whose ammocoetes larvae after metamorphosis return to the ocean is:

The structures that help some bacteria to attach to rocks and/or host tissues are:

If you suspect major deficiency of antibodies in a person, to which of the following would you look for confirmatory evidence?

In human females, meiosis-II is not completed until:

Which of the following layers in an antral follicle is acellular?

In his classic experiments on pea plants, Mendel did not use:

Which one of the following fruits is parthenocarpic?

In angiosperms, microsporogenesis and megasporogenesis:

A gene showing codominance has:

The chitinous exoskeleton of arthropods is formed by the polymerisation of:

The imperfect fungi which are decomposers of litter and help in mineral cycling belong to:

The wings of a bird and the wings of an insect are:

Flower are unisexual in:

Increase in concentration of the toxicant at successive trophic levels is known as:

Destruction of the anterior horn cells of the spinal cord would result in loss of:

Roots play insignificant role in absorption of water in:

Match the columns and identify the correct option:(a) Thylakoids — (i) Disc-Shaped sacs in Golgi apparatus(b) Cristae — (ii) Condensed structure of DNA(c) Cisternae — (iii) Flat membranous sacs in stroma(d) Chromatin — (iv) Infoldings in mitochondria

Identify the correct order of organisation of genetic material from largest to smallest:

Which one of the following hormones though synthesized elsewhere, is stored and released by the master gland?

Tell the correct order of the components with reference to their arrangement from outer side to inner side in a woody dicot stem:(a) Secondary cortex, (b) Wood, (c) Secondary phloem, (d) Phellem

Which of the following joints would allow no movement?

Which one of the following is not applicable to RNA?

Doctors use stethoscope to hear the sound produced during each cardiac cycle. The second sound is heard when:

During ecological succession:

In the following human pedigree, the filled symbols represent the affected individuals. Identify the type of given pedigree.

Balbiani rings are sites of:

Name the pulmonary disease in which alveolar surface area involved in gas exchange is drastically reduced due to damage in the alveolar walls:

Which the following are most suitable indicator of ${\text{SO}}_2$ pollution in the environment?

Satellite DNA is important because it:

Industrial melanism is an example of:

A column of water within xylem vessels of tall trees does not break under its weight because of:

The introduction of t-DNA into plants involves:

Pick up the wrong statement:

In photosynthesis, the light-independent reactions take place at:

Which of the following immunoglobulins does constitute the largest percentage in human milk?

Which of the following pairs is not correctly matched?

The UN conference of Parties on climate change in the year 2012 was held at:

In the spectrum of hydrogen, the ratio of the longest wavelength in the Lyman series to the longest wavelength in the Balmer series is:

The energy of the em waves is of the order of $15\text{keV}$. To which part of the spectrum does it belong?

An electron moves on a straight line path $XY$ as shown. The $abcd$ is a coil adjacent to the path of electron. What will be the direction of current, if any, induced in the coil?

The cylindrical tube of a spray pump has radius $R$, one end of which has $n$ fine holes, each of radius $r$. If the speed of the liquid in the tube is $V$, the speed of the ejection of the liquid through the holes is:

The Young’s modulus of steel is twice that of brass. Two wires of same length and of same area of cross section, one of steel and another of brass are suspended from the same roof. If we want the lower ends of the wires to be at the same level, then the weights added to the steel and brass wires must be in the ratio of:

A potentiometer wire of length $L$ and a resistance $r$ are connected in series with a battery of e.m.f. $E_0$ and a resistance $r_1$. An unknown e.m.f. $E$ is balanced at a length $l$ of the potentiometer wire. The e.m.f. $E$ will be given by:

A particle is executing a simple harmonic motion. Its maximum acceleration is $\alpha$ and maximum velocity is $\beta$. Then, its time period of vibration will be:

If vectors $\vec{A}=\cos \omega t\hat{i}+\sin \omega t\hat{j}$ and $\vec{B}=\cos \frac{\omega t}{2}\hat{i}+\sin \frac{\omega t}{2}\hat{j}$ are functions of time, then the value of $t$ at which they are orthogonal to each other is:

A source of sound $S$ emitting waves of frequency $100\text{Hz}$ and an observer $O$ are located at some distance from each other. The source is moving with a speed of $19.4{\text{ms}}^{-1}$ at an angle of $60^{\circ }$ with the source-observer line. The observer is at rest. The apparent frequency observed by the observer (velocity of sound in air $330{\text{ms}}^{-1}$), is:

An automobile moves on a road with a speed of $54{\text{km h}}^{-1}$. The radius of its wheels is $0.45\text{m}$ and the moment of inertia of the wheel about its axis of rotation is $3{\text{kg m}}^2$. If the vehicle is brought to rest in $15\text{s}$, the magnitude of average torque transmitted by its brakes to the wheel is:

A rectangular coil of length $0.12\text{m}$ and width $0.1\text{m}$ having $50$ turns of wire is suspended vertically in a uniform magnetic field of strength $0.2{\text{Weber/m}}^2$. The coil carries a current of $2\text{A}$. If the plane of the coil is inclined at an angle of $30^{\circ }$ with the direction of the field, the torque required to keep the coil in stable equilibrium will be:

A parallel plate air capacitor has capacity $C$, distance of separation between plates is $d$ and potential difference $V$ is applied between the plates. Force of attraction between the plates of the parallel plate air capacitor is:

Two vessels separately contain two ideal gases $A$ and $B$ at the same temperature, the pressure of $A$ being twice that of $B$. Under such conditions, the density of $A$ is found to be $1.5$ times the density of $B$. The ratio of molecular weight of $A$ and $B$ is:

A satellite $S$ is moving in an elliptical orbit around the earth. The mass of the satellite is very small compared to the mass of the earth. Then:

In the given figure, a diode $D$ is connected to an external resistance $R=100\Omega$ and an e.m.f. of $3.5\text{V}$. If the barrier potential developed across the diode is $0.5\text{V}$, the current in the circuit will be:

A remote-sensing satellite of earth revolves in a circular orbit at a height of $0.25\times 10^6\text{m}$ above the surface of earth. If earth’s radius is $6.38\times 10^6\text{m}$ and $g=9.8{\text{ms}}^{-2}$, then the orbital speed of the satellite is:

The position vector of a particle $\vec{R}$ as a function of time is given by:
$$\vec{R}=4\sin (2\pi t)\hat{i}+4\cos (2\pi t)\hat{j}$$
Where $R$ is in meters, $t$ is in seconds and $\hat{i}$ and $\hat{j}$ denote unit vectors along $x$ - and $y$ -directions, respectively. Which one of the following statements is wrong for the motion of particle?

A string is stretched between fixed points separated by $75.0\text{cm}$. It is observed to have resonant frequencies of $420\text{Hz}$ and $315\text{Hz}$. There are no other resonant frequencies between these two. The lowest resonant frequency for this string is:

Point masses $m_1$ and $m_2$ are placed at the opposite ends of a rigid rod of length $L$, and negligible mass. The rod is to be set rotating about an axis perpendicular to it. The position of point $P$ on this rod through which the axis should pass so that the work required to set the rod rotating with angular velocity ${\omega }_0$ is minimum, is given by:

At the first minimum adjacent to the central maximum of a single-slit diffraction pattern, the phase difference between the Huygen's wavelet from the edge of the slit and the wavelet from the midpoint of the slit is:

A force $\vec{F}=\alpha \hat{i}+3\hat{j}+6\hat{k}$ is acting at a point $\vec{r}=2\hat{i}-6\hat{j}-12\hat{k}$. The value of $\alpha$ for which angular momentum about origin is conserved is:

Two particles $A$ and $B$ move with constant velocities ${\vec{v}}_1$ and ${\vec{v}}_2$. At the initial moment their position vectors are ${\vec{r}}_1$ and ${\vec{r}}_2$ respectively. The condition for particles $A$ and $B$ for their collision is:

A nucleus of uranium decays at rest into nuclei of thorium and helium. Then:

Two metal wires of identical dimensions are connected in series. If ${\sigma }_1$ and ${\sigma }_2$ are the conductivities of the metal wires respectively, the effective conductivity of the combination is:

Light of wavelength $500\text{nm}$ is incident on a metal with work function $2.28\text{eV}$. The de Broglie wavelength of the emitted electron is:

$4.0\text{g}$ of a gas occupies $22.4$ liters at NTP. The specific heat capacity of the gas at constant volume is $5.0{\text{J K}}^{-1}{\text{mol}}^{-1}$. If the speed of sound in this gas at NTP is $952{\text{m s}}^{-1}$, then the molar heat capacity at constant pressure is (Take gas constant $R=8.3{\text{J K}}^{-1}{\text{mol}}^{-1}$):