Questions

A good producer of citric acid is

A good producer of citric acid is Options (a) Pseudomonas (b) Clostridium (c) Saccharomyces (d) Aspergillus Correct Answer: AspergillusExplanation:Aspergillus niger…

A dikaryon is formed when

A dikaryon is formed when Options (a) meiosis is arrested (b) the two haploid cells do not fuse immediately (c)…

What is the mass of precipitate formed when x mL of solution is mixed with another

What is the mass of precipitate formed when 50 mL of 16.9% solution of AgNO₃ is mixed with 50 mL…

If avagadro number is changed what changes

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 number of water molecules is maximum in

The number of water molecules is maximum in Options (a) 1.8 molecules of water (b) 1.8 gram of water (c)…

Magnesium carbonate of x g decomposes. What is the percentage of purity

20.0 g of a magnesium carbonate sample decomposes on heating to give CO₂ and 8.0 g magnesium oxide. What will…

What is the molar ratio of mixture of gases given the ratio of gases

A mixture of gases contains H₂ and O₂ gases in ratio of 1:4(w/w). What is the molar ratio of the…

When x g of magnesium burnt with oxygen what is left

1.0 g of magnesium is burnt with 0.56 g O₂ in a closed vessel. Which reactant is left in excess…

When x litres hydrogen and chlorine are mixed, moles of HCl is

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…

Constant Characteristic of living organism

Which one is a constant characteristic of living organisms? Options (a) Adaptation (b) Metabolism (c) Homeostasis (d) Reproduction Correct Answer:…