NEET 2018

173 Questions • 180 Minutes • 2018

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Q121
The moment of the force, $\vec{F} = 4\hat{i} + 5\hat{j} - 6\hat{k}$ at (2, 0, -3), about the point (2, -2, -2), is given by
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Q122
A student measured the diameter of a small steel ball using a screw gauge of least count 0.001 cm. The main scale reading is 5 mm and zero of circular scale division coincides with 25 divisions above the reference level. If screw gauge has a zero error of -0.004 cm, the correct diameter of the ball is
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Q123
A solid sphere is rotating freely about its symmetry axis in free space. The radius of the sphere is increased keeping its mass same. Which of the following physical quantities would remain constant for the sphere ?
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Q124
If the mass of the Sun were ten times smaller and the universal gravitational constant were ten times larger in magnitude, which of the following is not correct ?
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Q125
A solid sphere is in rolling motion. In rolling motion a body possesses translational kinetic energy ($K_t$) as well as rotational kinetic energy ($K_r$) simultaneously. The ratio $K_t : (K_t + K_r)$ for the sphere is
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Q126
A small sphere of radius 'r' falls from rest in a viscous liquid. As a result, heat is produced due to viscous force. The rate of production of heat when the sphere attains its terminal velocity, is proportional to
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Q127
The power radiated by a black body is P and it radiates maximum energy at wavelength, $\lambda_0$. If the temperature of the black body is now changed so that it radiates maximum energy at wavelength $\frac{3}{4}\lambda_0$, the power radiated by it becomes nP. The value of n is
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Q128
Two wires are made of the same material and have the same volume. The first wire has cross-sectional area A and the second wire has cross-sectional area 3A. If the length of the first wire is increased by $\Delta l$ on applying a force F, how much force is needed to stretch the second wire by the same amount ?
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Q129
A sample of 0.1 g of water at 100°C and normal pressure ($1.013 \times 10^5$ $Nm^{-2}$) requires 54 cal of heat energy to convert to steam at 100°C. If the volume of the steam produced is 167.1 cc, the change in internal energy of the sample, is
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Q130
The correct order of N-compounds in its decreasing order of oxidation states is
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Q131
Which one of the following elements is unable to form $MF_6^{3-}$ ion ?
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Q132
Considering Ellingham diagram, which of the following metals can be used to reduce alumina ?
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Q133
The correct order of atomic radii in group 13 elements is
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Q134
Which of the following statements is not true for halogens ?
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Q135
In the structure of $ClF_3$, the number of lone pairs of electrons on central atom 'Cl' is
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Q136
Identify the major products P, Q and R in the following sequence of reactions : $C_6H_6 + CH_3CH_2CH_2Cl \xrightarrow{Anhydrous\ AlCl_3} P \xrightarrow[(ii)\ H_3O^+/\Delta]{(i)\ O_2} Q + R$
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Q137
Which of the following compounds can form a zwitterion ?
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Q138
Regarding cross-linked or network polymers, which of the following statements is incorrect ?
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Q139
Nitration of aniline in strong acidic medium also gives m-nitroaniline because
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Q140
The difference between amylose and amylopectin is
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Paper Info
  • Exam: NEET
  • Year: 2018
  • Questions: 173
  • Duration: 180 mins
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