Which of the following is a wrong statement?
(A) Fast reactors use a moderator (B) Fast neutrons have energies above 1000eV (C) Slow or thermal neutrons have an... View Article
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An element having a bcc structure has 12.08 * 1023 unit cells. The number of atoms in these cells is:
(A) 12.08 * 1022 (B) 12.08 * 1023 (C) 24.16 * 1023 (D) 48.38 * 1023 The Correct Answer is... View Article
If the conductivity of 0.02 M solution of KCL at 298 K is 0.0248S cm-1.Calculate its molar conductivity.
(A) 112 Scm2mol-1 (B) 124 S cm2mol-1 (C) 136 S cm2mol-1 (D) 148 S cm2mol-1 The Correct Answer is (B)... View Article
When acidified K2Cr2O7 solution is added to Sn2+ salt, then Sn2+ changes to:
(A) Sn (B) Sn+ (C) Sn3+ (D) Sn4+ The Correct Answer is (D) Sn4+ Solution: K2Cr2O7 is an oxidizing agent,... View Article
The complex for which the calculation of crystal field splitting can be most easily done, by knowing its absorption spectrum, will be :
(A) \(\begin{array}{l}[CoF_{6}]^{3-}\end{array} \) (B) \(\begin{array}{l}[TiCl_{6}]^{2-}\end{array} \) (C) \(\begin{array}{l}[Ti(CN)_{6}]^{3-}\end{array} \) (D) \(\begin{array}{l}[Fe(H_{2}O)_{6}]^{2+}\end{array} \) The Correct Answer is (C)\(\begin{array}{l} [Ti(CN)_{6}]^{3-}\end{array} \) Solution:... View Article
Which of the following product is obtained when a mixture of methane(CH4)and oxygen(O2) is passed through heated molybdenum (Mo2O3) at 543k at 100 atm pressure?
(A) Ethanal (B) Methanol (C) Methanal (D) Methanoic acid The Correct Answer is (C) Methanal Solution: When a mixture of... View Article
By adding a small amount of KMnO4 to concentrated H2SO4, a green oily compound is obtained, which is highly explosive in nature. Identify the compound from the following options.
(A) MnO2 (B) MnSO4 (C) Mn2O3 (D) Mn2O7 The Correct Answer is (D) Mn2O7 Solution: By adding a small amount... View Article
Arrange the following compounds in decreasing order of their boiling points.Bromomethane (CH3Br), Bromoethane(CH3CH2Br), Bromoalkane (CH3CH2CH2Br), Bromobutane (CH3CH2CH2CH2Br)
(A) Bromomethane > Bromoethane > Bromoalkane > Bromobutane (B) Bromobutane > Bromoalkane > Bromomethane > Bromoethane (C) Bromobutane > Bromoalkane... View Article
Which of the following chemical compound contains a maximum number of Hydrogen atoms:
(A) H2O (B) CH4 (C) H2O2 (D) CuSO4.5H2O The Correct Answer is (B) CH4 Solution: Methane(CH4) is a colourless odourless... View Article
A man purchases two clocks A and B at a total cost of Rs 650. He sells A at 20% profit and B at a loss of 25% and gets the same selling price for both the clocks. What are the purchasing prices of A and B respectively?
Let the cost price of clock A be X and that of clock B be 650 -x. From the given... View Article
Integral xsinxsec^3x dx is equal to
∫x sinx sec3 x dx=∫x sinx (1/cos3x)dx =∫x tanx sec2x dx =x ∫secx (secx tanx)dx−∫[∫secx(secx tanx)dx]dx+C Now, we have to... View Article
What are x-intercept and y-intercept?
X- intercept: The x-intercept represents where the graph crosses the x-axis. The x-intercept of a line gives the idea about... View Article
A train 100 meters long takes 6 seconds to cross a man walking at 5km/h in a direction opposite to that of the train. The speed of the train is
Given that, the length of a train = 100m = 100/1000 km = 1/10 km. Time = 6 sec =... View Article
Two boys A and B find the jumble of n ropes lying on the floor. Each takes hold of one loose end randomly. If the probability that they are both holding the same rope is 1/101, then the number of ropes is equal to
As we know that a rope has two ends. Hence, for n ropes, the total number of ends = 2n.... View Article
The sum and difference of two perpendicular vector of equal length are
Perpendicular to each other and of equal length Perpendicular to each other and of different lengths Of equal length and... View Article
What happens to the focal length of a convex lens when it is immersed in water?
Answer: Increases Solution: \(\begin{array}{l}\frac{1}{f}=(\mu -1)\left ( \frac{1}{R_{1}}-\frac{1}{R_{2}} \right )\end{array} \) \(\begin{array}{l}f\propto 1/(\mu – 1) \end{array} \) μ = n/n’ here... View Article
If the tension in the cable supporting an elevator is equal to the weight of the elevator, the elevator maybe
a) going up with the increasing speed b) going done with increasing speed c) going up with the uniform speed... View Article
When the angle of contact between a solid and a liquid is 90o, then
a) Cohesive force > Adhesive force b) Cohesive force < Adhesive force c) Cohesive force = Adhesive force d) Cohesive force >> Adhesive... View Article
A solid sphere is in a rolling motion. In rolling motion, a body possesses translational kinetic energy (Kt) as well as rotational kinetic energy (Kr) simultaneously. The ratio Kt:(Kt+Kr) for the sphere is?
a) 10:7 b) 7:10 c) 2:5 d) 5:7 Answer: d) 5:7 Solution: Linear kinetic energy, Kt = mv2/2 Rotational kinetic energy,... View Article
The least resolvable angle by a telescope using an objective of aperture 5 m is nearly (λ=4000Å)
a) 1/500 b) (1/50) minute c) (1/50) sec d) (1/500) sec Answer: c) (1/50) sec Solution: θmin = 1.22λ/d = 1.22... View Article
