40 mg of pure sodium peroxide is dissolved in 10L of distilled water. The pH of
40 mg of pure sodium peroxide is dissolved in 10L of distilled water. The pH of the solution is
Options
(a) 9 (b) 10 (c) 11 (d) 12
Correct Answer:
10
Explanation:
No […]
Questions
If increase in temperature and volume of an ideal gas is two times, then the initial
If increase in temperature and volume of an ideal gas is two times, then the initial pressure P changes to
Options
(a) 4P (b) 2P (c) P (d) 3P
Correct Answer:
P
Explanation: […]
The interatomic distances in H₂ and Cl molecules are 74 and 198 pm respectively
The interatomic distances in H₂ and Cl molecules are 74 and 198 pm respectively. The bond length of HCl is
Options
(a) 124 pm (b) 248 pm (c) 272 pm (d) 136 pm
After tow hours, the ratioactive substance becomes 1/16th of original amount
After tow hours, the ratioactive substance becomes 1/16th of original amount. Then the half -life (in min) is
Options
(a) 60 min (b) 120 min (c) 30 min (d) 15 min
Correct Answer: […]
The wavelength of the radiation emitted when an electron drops from 3rd orbit
The wavelength of the radiation emitted when an electron drops from 3rd orbit to 2nd orbit in H – atom will be nearly
Options
(a) 3300 A⁰ (b) 6600 A⁰ (c) 9900 A⁰ […]
When 4g of iron is burnt to ferric oxide at constant pressure, 29.28 kJ of heat
When 4g of iron is burnt to ferric oxide at constant pressure, 29.28 kJ of heat is evolved. What is the enthalphy of formation of ferric oxide? (At. Wt of Fe=56)
Options
(a) […]
Aspirin is an
Aspirin is an
Options
(a) antithistamine (b) antimalarial (c) analgesic (d) antibiotic
Correct Answer:
analgesic
Explanation:
No explanation available. Be the first to write the explanation for this question by commenting below.
Glycerine is a/an
Glycerine is a/an
Options
(a) ester (b) secondary alcohol (c) tertiary alcohol (d) trihydric alcohol
Correct Answer:
trihydric alcohol
Explanation:
No explanation available. Be the first to write the explanation for this question […]
Transition elements
Transition elements
Options
(a) do not act as catalysts (b) have low melting point (c) exhibit variable valency (d) exhibit inert pair effect
Correct Answer:
exhibit variable valency
Explanation:
No explanation available. Be […]
Dialysis can separate
Dialysis can separate
Options
(a) glucose and Nacl (b) glucose and sucrose (c) glucose and fructose (d) glucose and proteins
Correct Answer:
glucose and proteins
Explanation:
No explanation available. Be the first to […]