Which of the following is used in the preparation of generated water (soda)

1.  CO

2.  CO2

3.  SO2

4.  HCl

View Answer  
4
Correct Answer :

CO2


Explanation :
No Explanation available for this question

What is the molecular formula of gypsum

1.  CaSO4, H2O

2.  CaSO4, 2H2O

3.  2 CaSO4, H2O

4.  CaSO4, 3H2O

View Answer  
4
Correct Answer :

CaSO4, 2H2O


Explanation :
No Explanation available for this question

In the Castner's process of extraction of sodium cathode is

1.  iron rod

2.  nickel rod

3.  copper rod

4.  graphite rod

View Answer  
4
Correct Answer :

iron rod


Explanation :
No Explanation available for this question

In which of the following reactions. Hydrogen peroxide acts as a reducing agent

1.  PbS+4H2O2→PbSO4+4H2O

2.  Na2SO3+H2O2→Na2SO4+ H2O

3.  Ag2O(moist)+ H2O2→2Ag+ H2O + O2

4.  NaNO2+ H2O2→NaNO3+ H2O

View Answer  
4
Correct Answer :

Ag2O(moist)+ H2O2→2Ag+ H2O + O2


Explanation :
No Explanation available for this question

Which of the following reactions does not involve change in the oxidation state of the metal

1.  VO2+→V2O3

2.  Na →Na+

3.  CrO-24→ Cr2O-27

4.  Zn2+→Zn

View Answer  
4
Correct Answer :

CrO-24→ Cr2O-27


Explanation :
No Explanation available for this question

What is the value (in liters) of CO2 liberated at STP when 2.12 g of sodium carbonate (mol. Wt. 106) is treated with excess dilute HCl

1.  2.28 L

2.  0.488 L

3.  44.8 L

4.  22.4 L

View Answer  
4
Correct Answer :

0.488 L


Explanation :
No Explanation available for this question

Which of the following is correct for acid buffer[salt=S, acid=A]

1.  pKa= pH+log[s]/[A]

2.   pH=pKa+ log[s]/[A]

3.  pKa = pH- [A]/[s]

4.  pH=pKa+log [A]/[s]

View Answer  
4
Correct Answer :

pH=pKa+ log[s]/[A]


Explanation :
No Explanation available for this question

The pH of an aqueous solution of a salt is 10. The salt is

1.  NaCl

2.  NH4Cl

3.  CH3COONa

4.  (NH4)2SO4

View Answer  
4
Correct Answer :

CH3COONa


Explanation :
No Explanation available for this question

The electronic configuration of group III elements is:

1.  ns1np2

2.  ns2np3

3.   ns2np2

4.  ns2np1

View Answer  
4
Correct Answer :

ns2np1


Explanation :
No Explanation available for this question

Which of the following has the highest first IP

1.  Al

2.  Si

3.  K

4.  P

View Answer  
4
Correct Answer :

P


Explanation :
No Explanation available for this question
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