A good producer of citric acid is
Options
(a) Pseudomonas (b) Clostridium (c) Saccharomyces (d) Aspergillus
Correct Answer:
Aspergillus
Explanation:
Aspergillus niger is a fungus and one of the most common species of […]
A dikaryon is formed when
Options
(a) meiosis is arrested (b) the two haploid cells do not fuse immediately (c) cytoplasm does not fuse (d) none of the above
Correct Answer:
the two haploid […]
What is the mass of precipitate formed when 50 mL of 16.9% solution of AgNO₃ is mixed with 50 mL of 5.8% NaCl Solution? (Ag=107.8, N=14, O=16, Na=23, Cl=35.5)
Options
(a) 28 g (b) […]
If avagadro number is changed from 6.022 x 10²³ mol⁻¹ to 6.022 x 10²⁰ mol⁻¹, this would change
Options
(a) the definition of mass in units of grams (b) the mass of one […]
The number of water molecules is maximum in
Options
(a) 1.8 molecules of water (b) 1.8 gram of water (c) 18 gram of water (d) 18 moles of water
Correct Answer:
18 moles […]
20.0 g of a magnesium carbonate sample decomposes on heating to give CO₂ and 8.0 g magnesium oxide. What will be the percentage purity of magnesium carbonate in the sample?
Options
(a) 75 (b) […]
A mixture of gases contains H₂ and O₂ gases in ratio of 1:4(w/w). What is the molar ratio of the two gases in the mixture?
Options
(a) 4:1 (b) 16:1 (c) 2:1 (d) […]
1.0 g of magnesium is burnt with 0.56 g O₂ in a closed vessel. Which reactant is left in excess and how much? At wt Mg=24, O₂=16)
Options
(a) Mg, 0.16g (b) O₂, 0.16g […]
When 22.4 litres of H₂(g) is mixed with 11.2 litres of Cl₂(g), each at S.T.P, the moles of Hcl(g) formed is equal to
Options
(a) 1 mol of Hcl(g) (b) 2 mol of Hcl(g) […]
Which one is a constant characteristic of living organisms?
Options
(a) Adaptation (b) Metabolism (c) Homeostasis (d) Reproduction
Correct Answer:
Homeostasis
Explanation:
Although Reproduction and Metabolism are characteristics of living organism, the characteristics which […]
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