Electron microscopic studies of the sarcomeres have revealed that during muscle contraction
Options
(a) The width of A-band remains constant (b) The width of the H-zone becomes smaller (c) The width of I-band […]
which of the following statement is not true with reference to mitochondria?
Options
(a) they divide in synchrony with cell cycle (b) they contain DNA (c) they contain cristae (d) they store and […]
In the equation of state of an ideal gas PV = nRT, the value of the universal gas constant would depend only on
Options
(a) the nature of the gas (b) the pressure […]
Alum is a water purifier because it
Options
(a) coagulates the impurities (b) softens hard water (c) gives taste (d) destroys the pathogenic bacteria
Correct Answer:
coagulates the impurities
Explanation:
No explanation available. […]
Antiseptic chloroxylenol is
Options
(a) 4-chloro-3,5-dimethylphenol (b) 3-chloro-4,5-dimethylphenol (c) 4-chloro-2,5-dimethylphenol (d) 5-chloro-3,4-dimethylphenol
Correct Answer:
4-chloro-3,5-dimethylphenol
Explanation:
No explanation available. Be the first to write the explanation for this question by commenting below.
Ethyl chloride on heating with AgCN forms a compound X. The functional isomer of X is
Options
(a) C₂H₅NC (b) C₂H₅NH₂ (c) C₂H₅CN (d) none of these
Correct Answer:
C₂H₅CN
Explanation:
No explanation […]
Three dimensional molecules with cross links are formed in the case of a
Options
(a) thermoplastic (b) thermosetting plastic (c) both (d) none
Correct Answer:
thermosetting plastic
Explanation:
Thermosetting plastic have three dimensional cross-linked […]
An example for a saturated fatty acid, present in nature is
Options
(a) oleic acid (b) linoleic acid (c) linolenic acid (d) palmitic acid
Correct Answer:
palmitic acid
Explanation:
Oleic acid – C₁₇H₃₃COOH, […]
Which compound is zero valent metal complex
Options
(a) [Cu(NH₃)₄]SO₄ (b) [Pt(NH₃)₂Cl₂] (c) [Ni(CO)₄] (d) K₃[Fe(CN)₆]
Correct Answer:
[Ni(CO)₄]
Explanation:
[Cu(NH₃)₄]SO₄ → oxidation number of Cu = +2. [Pt(NH₃)₂Cl₂] → Oxidation number of […]
Use of chlorofluoro carbons is not encouraged because
Options
(a) they are harmful to the eyes of people that use it (b) they damage the refrigerators and air conditioners (c) they eat away […]
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