List of practice Questions

Correct order of first ionization energy of Li, Be, C, B, N, O, F
Which of the following can be represented as a meridional isomer?

Find the number of atoms per unit cell if edge length is 300pm, density = 3 g/cm3 , molecular mass = 40 g(nearest integer)

Identify the correct statement about the compound GaAIC14
If \(x+y+z=17\) and x, y, z are non-negative integers, then find the number of integral solutions is
5 boys with allotted roll numbers and seat numbers are seated in such a way that no one sits on the allotted seat. The number of such seating arrangements is?
Let \( S = \{ M = [a_{ij}], a_{ij} \in \{0, 1, 2\}, 1 \leq i, j \leq 2 \} \) be a sample space and \( A = \{ M \in S : M \text{ is invertible} \} \) be an event. Then \( P(A) \) is equal to:
Suppose a situation in which two planets orbits around the sun in the same orbit. If the mass of plant 1 is twice the mass of planet 2, then what do they have same?
pH of 1 litre of HCL solution is 1. How much water (in litres) is added to make pH=2?

Match the terms in Column-I with their description in Column-II and choose the correct option:

 Column 1(Type of hydride) Column II
A.Electron1.MgH2
B.Electron precise2.HF
C.Electron rich3.CH4
D.Saline Hydride4.B2H6

Consider the following reaction sequence: \([CaCl_2 + Na_2CO_3 → X+Y] → Z\)

\(\frac{nC_n}{(n+1)}\) + \(\frac{nC_{n-1}}{(n)}\) + ……… + ½ \(nC_1\) + \(nC_0\) = \(\frac{255}{8}\), Then value of n is
The equation of progressive wave is y=5sin(6t + 0.03x). Find the speed of wave

If the earth suddenly shrinks to \(\frac{1}{ 64}\) th of its original volume with its mass remaining the same, the period of rotation of earth becomes \(\frac{24}{ x}\) h. The value of x is .

Number of molecules and moles in 2.8375 litre of O2 at STP.
The number of bent-shaped molecule(s) from the following is_______? 
SO2, O3, I3-, N3-
The degree of dissociation of monobasic acid is 0 3 By what percent is the observed depression in freezing point greater than the calculated depression in freezing point ?
The Sum of number of lone pairs in central atom in IF5 and IF7 is:
At constant temperature, a gas is at a pressure of 940.3 mm Hg. The pressure at which its volume decreases by 40% is mm Hg. (Nearest integer)
If the number of ways in which a mixed double badminton can be played such that no couples played into a same game is 840. Then find the number of players?
Two dice are rolled and sum of numbers of two dice is N then probability that 2N < N! is m/n , where m and n are co-prime, then 11m – 3n is?
Ratio between rms speed of Ar to the most probable speed of \(O^2\) at \(27\degree C\) is
Let \(y = y(x), y > 0,\) be a solution curve of the differential equation \((1 +x^2)dy = y(x−y)dx.\) If \(y(0) = 1\) and \(y(2√2) = β\), then
For the expression \((1-x)^{100}\). Then sum of coefficient of first 50 terms is:
Match the Column:
 Column I Column II
(A).ClO2-(1).Linear
(B).N3-(2).Tetrahedral
(C).NH4+(3).Bent
(D).SF4(4).See-Saw