User Forum

Study the given classification chart and select the correct option.

    
              a                  b             c               d

ANylon         Cotton       Silk          Wool
BFlax            Silk           Cotton       Wool
CCotton         Flax          Wool         Silk
DCotton         Jute           Silk           Wool

The given figure shows the set-up to study the reaction between gas X and copper (II) oxide :

Which of the following statements are correct?
[Given : Atomic mass of N = 14 u, H = 1 u, O = 16 u, C = 12 u]
I. Gas X is a compound of two elements, nitrogen and hydrogen.
II. The number of atoms present in 11.2 L of N₂ is 6.023 × 10²³.
III. 1 mole of H₂O contains 1 mole of oxygen molecules and 2 moles of hydrogen atoms.
IV. N₂ gas being soluble in water is collected by upward displacement of water.

AI and II only
BI and III only
CII and IV only
DIII and IV only

If White is called Black, Black is called Red, Red is called Green and Green is called Yellow, then colour of the human blood is _________.

AGreen
BWhite
CYellow
DBlack

To demagnetise a magnet using the heating method, which of the following is the correct step?

AHeat the magnet to become red hot, and allow it to cool in the east west direction.
BHeat the magnet to become red hot, and allow it to cool in the north south direction.
CHeat the magnet in boiling water, and allow it to cool in the north south direction.
DBoth A and B

________ is the organ where absorption of water from undigested food occurs.

A
B
C
D

Which of the following options will complete the pattern in Fig. (X)?
    


A

B

C

D

Which of the following reactions are exothermic in nature?
(i) Evaporation of water
(ii) Dissolution of sodium hydroxide in water
(iii) Dilution of sulphuric acid
(iv) Dissolution of ammonium chloride in water
(v) Combustion of methane gas

A (i), (iv) and (v) only
B (ii), (iii) and (v) only
C (i), (ii) and (iv) only
D (i), (iii) and (iv) only

Study the given graph carefully and select the correct statement(s).


I. When water is cooled to 4°C, the volume decreases.
II. Ice and water co-exist at 0°C.
III. Water has minimum density at point Q.
IV. The volume of ice is more than that of water.

AI only
BII and III only
CI, II and IV only
DAll of these

Pointing to a photograph, Sonal says, "This man's son's sister is my mother-in-law". How is the Sonal's husband related to the man in the photograph?

AGrandson
BSon
CSon-in-law
DNephew