In humans which among these is not a step in respiration
In humans, which among these is not a step in respiration
Options
(a) Pulmonary ventilation (b) Alveolar diffusion of O₂ and CO₂ (c) Diffusion of O₂ and CO₂ between blood and tissues (d) […]
KL2012
Which of the following with respect to early experiments of photosynthesis
Which of the following with respect to early experiments of photosynthesis is wrongly matched?
Options
(a) Joseph Priestley- Showed that plants release O₂ (b) Jan Ingenhousz – Showed that sunlight is essential for […]
One mineral activates the enzyme catalase and the other is a constituent of
One mineral activates the enzyme catalase and the other is a constituent of the ring structure of chlorophyll. These minerals are respectively
Options
(a) iron and magnesium (b) iron ans manganese (c) magnesium […]
The strength of H₂O₂ (in g/litre) in 11.2 volume solution of H₂O₂ is
The strength of H₂O₂ (in g/litre) in 11.2 volume solution of H₂O₂ is
Options
(a) 17 (b) 51 (c) 34 (d) 85
Correct Answer:
34
Explanation:
1 mL of solution contains 0.03035 g […]
Syngas is a mixture of
Syngas is a mixture of
Options
(a) CO₂ + H₂ (b) CO + H₂ (c) CO + CO₂ (d) CO + N₂
Correct Answer:
CO + H₂
Explanation:
No explanation available. Be the […]
Which one of the following is not a sulphide ore
Which one of the following is not a sulphide ore
Options
(a) Magnetic (b) Iron pyrites (c) Galena (d) Sphalerite
Correct Answer:
Galena
Explanation:
No explanation available. Be the first to write the […]
Secondary amines could be prepared by
Secondary amines could be prepared by
Options
(a) reduction of nitriles (b) Hoffmann bromamide reaction (c) reduction of amides (d) reduction of isonitriles
Correct Answer:
reduction of isonitriles
Explanation:
No explanation available. Be […]
The products formed when diborane is hydrolysed are
The products formed when diborane is hydrolysed are
Options
(a) B₂O₃ and H₃BO₃ (b) B₂O₃ only (c) H₃ BO₃ and H₂ (d) H₃BO₃ only
Correct Answer:
H₃ BO₃ and H₂
Explanation:
No explanation […]
Germanium of very high purity is obtained by
Germanium of very high purity is obtained by
Options
(a) liquation (b) vapour phase refining (c) distilation (d) zone refining
Correct Answer:
zone refining
Explanation:
Metals of high purity are obtained by zone refining, […]
The element that does not show catenation among the following p-block elements is
The element that does not show catenation among the following p-block elements is
Options
(a) carbon (b) silicon (c) germanium (d) lead
Correct Answer:
lead
Explanation:
No explanation available. Be the first to […]