The process of conversion of sugar into alcohol is called
(i) nitrogen fixation
(ii) moulding
(iii) fermentation
(iv) infection
0 Answers
What are the conditions necessary for fixation of atmospheric nitrogen by Rhizobium. What is their role in N2 -fixation?
Rhizobium is a symbiotic bacteria present in the root nodules of leguminous plants. The basic requirements for Rhizobium to carry out nitrogen fixation are as follows: (a) Presence of the enzyme nitrogenase (b)...
1 Answers 1 views
The process of nitrogen-fixation by bacteria does not take place in the presence of
(b) elemental form of oxygen
1 Answers 1 views
(a) Conversion of solid to vapour is called sublimation. Name the term used to denote the conversion of vapour to solid.
(a) Sublimation (b) The amount of heat required to convert 1 kg of solid into liquid at one atmosphere pressure at its melting point is known as its latent heat of...
1 Answers 1 views
Yeast is used in the production of (i) sugar (ii) alcohol (iii) hydrochloric acid (iv) oxygen
(ii) alcohol
1 Answers 1 views
The process of conversion of sugar into alcohol is called (i) nitrogen fixation (ii) moulding (iii) fermentation (iv) infection
fermentation
1 Answers 1 views
Paheli’s mother made a concentrated sugar syrup by dissolving sugar in hot water. On cooling, crystals of sugar got separated. This indicates a –
(a) physical change that can be reversed.
1 Answers 1 views
Write a short note on nitrogen biological nitrogen fixation
The conversion of atmospheric nitrogen into the nitrogenous compounds through the agency of living organisms is called biological nitrogen fixation. The process is carried out by two main types of...
1 Answers 1 views
Which of the following is an exothermic reaction? (A) Conversion of limestone to quick lime. (B) Conversion of silver bromide to silver
(C) Formation of compost from vegetable matter. Reactions given in option (A), (B) and (D) are examples of endothermic reactions and require energy in form of heat, light and electricity respectively....
1 Answers 1 views
Explain the process of conversion of milk into curd by lactobacillus.
Milk is converted into curd or yogurt by the process of fermentation. Milk consists of globular proteins called casein. The curd forms because of the chemical reaction between the lactic...
1 Answers 1 views
The substance produced by a cell in viral infection that can protect other cells from further infection is:
c. interferon
1 Answers 1 views