If LCM of 24 and 42 is 168, find the HCF?

A hollow cuboid is of dimensions 30cm * 27cm * 15cm. How many small cubes with side 3cm can be placed in the given cuboid?

1. 340
2. 564
3. 220
4. 450

which one is correct according to addition property of equality

1. 12-10 =2
2. 9 + 2 = 9-2
3. 2+3+4 =4+2
4. 20+10 =10+20

Find the LCM of 12, 16 , 18

1. 122
2. 123
3. 422
4. 144

Find the Third proportion to 12 and 18.

1. 25
2. 23
3. 27
4. 29

The function y= is

1. increasing every where 
2. decreasing every where
3. increases for negative 'x' and decreases for positive ‘x’
4. increases for positive ‘x' and decreases for negative 'x'

If then f(x) is

1. decreasing at     
2. increasing at     
3. stationary at     
4. None of these    

The interval of increase of the function f(x)=x- +  is

1.    
2.    
3.    
4. None of these    

The probability density plots of 1s and 2s orbitals are given in figure

The density of dots in region represents the probability density of finding electrons in the region. On the basis of above diagram which of the following statements is incorrect?

1. The probability of finding the electron at a given distance is equal in all directions    
2. 1s and 2s orbitals are spherical in shape    
3. The probability of finding the electron is maximum near the nucleus    
4. The probability density of electrons for 2s orbitals decreases uniformly as distance from the nucleus increases    

Which of the following is an appropriate set of reactants for the preparation of 1-methoxy-4-nitrobenzene ?
A)
B) 

1. none of these    
2. only A    
3. both A and B    
4. only B    

The reaction,

is a (an) :

1. nucleophilic substitution reaction    
2. elimination reaction    
3. electrophilic substitution reaction    
4. addition reaction    

Examine the following two structures for the anilinium ion and choose the correct statement from the ones given below:

1. II is not an acceptable canonical structure because the nitrogen has 10 valence electrons    
2. II is not an acceptable canonical structure because carbocation ions are less stable than ammonium ions    
3. II is not an accepted canonical structure because it is non-aromatic    
4. II is an acceptable canonical structure    

The final product formed in this reaction is:

The estimation of available chlorine· in bleaching powder is done by:

1. Permanganometric titration    
2. Iodimetries titration    
3. Acid-base titration    
4. Iodometric titration    

Freundlich adsorption isotherm is given by the expression Then the slope of the line in the following plot is

1. x/m    
2. 1/n    
3. p    
4.    

The ascending order of A = , B = , C = is

1. A, B, C    
2. A, C, B    
3. B, C, A    
4. B, A, C