Portland cement contains the following amount of CaO
Options
(a) 5-15% (b) 20-35% (c) 50-60% (d) 70-80%
Correct Answer:
50-60%
Explanation:
No explanation available. Be the first to write the explanation for this […]
Which one of the following has an aromatic character
Options
(a) Cyclopentadiene (b) Cycloheptatrienylium cation (c) cyclopropyne (d) Cycloheptatrienyl anion
Correct Answer:
Cycloheptatrienylium cation
Explanation:
No explanation available. Be the first to write […]
Nitrogen is obtained by the thermal decomposition of
Options
(a) NH₄NO₃ (b) Pb(NO₃)₂ (c) NH₄NO₂ (d) AgNO₃
Correct Answer:
NH₄NO₂
Explanation:
No explanation available. Be the first to write the explanation for this […]
Aspirin is obtained by the reaction of salicylic acid with
Options
(a) acetic acid (b) acetaldehyde (c) acetone (d) acetic anhydride
Correct Answer:
acetic anhydride
Explanation:
The aspirin is obtained by the reaction of […]
Which of the following is the most electronegative element?
Options
(a) Bromine (b) Chlorine (c) Flourine (d) Iodine
Correct Answer:
Flourine
Explanation:
No explanation available. Be the first to write the explanation for […]
If a gas expands at constant temperature , it indicates that
Options
(a) kinetic energy of molecules remains the same (b) number of the molecules of gas increases (c) kinetic energy of molecules […]
Primary,secondary and tertiary amines can be distinguished by
Options
(a) Schiff’s test (b) Fehling’s test (c) Tollent’s test (d) Hinsberg’s test
Correct Answer:
Hinsberg’s test
Explanation:
This reaction takes place in the presence […]
If Ksp for HgSO₄ is 6.4 x 10⁻⁵, then solubility of the salt is
Options
(a) 6.4 x 10⁻⁵ (b) 8 x 10⁻³ (c) 6.4 x 10⁻³ (d) 8 x 10⁻⁶
Correct Answer: […]
Which of the following statement is not applicable to chemisorption
Options
(a) It is highly specific (b) It is slow (c) It is independent of temperature (d) It is irreversible
Correct Answer:
It […]
The reaction of chloroform with ethylamine in alcoholic alkali gives
Options
(a) C₂H₅CN (b) C₂H₅Cl (c) C₃H₇Cl (d) C₂H₅NC
Correct Answer:
C₂H₅NC
Explanation:
No explanation available. Be the first to write the explanation […]
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