Assertion (A) When H2O is added to CaO, heat is liberated.Reason (R) Reaction between CaO and H2O is exothermic.
Assertion (A) Ionisation energy decreases on moving down the group.Reason (R) Force of attraction between electrons and nucleus decreases on moving down the group.
Assertion (A) Reproduction is the process by which living organisms produce young ones of their species, There are different form of reproduction.Reason (R) Sex organs, male and female, are mandatory for reproduction.
Assertion (A) The main constituent of the liqufied petroleum gas in methane.Reason (R) Methane can be used directly for burning in homes and factories where it can be supplied through pipelines.
Assertion (A) Pearl is produced form bivalves or gastropods under controlled conditions.Reason (R) Pearl is made up of magnesium carbonate.
Assertion (A) Plastids have single stranded extrachromosomal DNA.Reason (R) Plastids are possessed by all eukaryotic organisms.
Assertion (A) Hydrocarbons are very good fuels.Reason (R) The main sources of hydrocarbons are natural gas, petroleum and coal.
Assertion (A) Cellunlose is used in making shatter proof glass.Reason (R) Polysaccharides are not soluble in water.
Assertion (A) Chloroplast is a called organelle.Reason (R) An organelle is a distinct part of a cell, which has a particular structure and function.
Assertion (A) To dilute sulfuric acid, acid is added to water and not water to acid.Reason (R) Specific heat of water is quite large.