Assertion : The position of an element in periodic table after emission of one α and two β-particles remains unchanged.
Reason : Emission of one α and two β-particles give isotope of the element which acquires same position in periodic table.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Among the following components of cement which is present in highest amount?
Ca2SiO4
Ca3SiO5
Al2O3
Ca3Al2O6
D.
Ca3Al2O6
Tricalcium aluminate or Ca3Al2O6 is present in highest amount in cement. Calcium aluminate cements are hydraulic cements made primarily from limestone and bauxite. They are well adapted for use in refractory (high temperature resistant) concretes. e.g. furnace linings.
Assertion : trans-butene on reaction with bromine forms racemic mixture.
Reason : trans-compound in trans addition forms two types of stereoisomers.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Assertion : The lactic acid shows the geometrical isomerism.
Reason : Lactic acid has carbon-carbon double bond.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Cyanogen gas is obtained in the reaction
CuSO4 (aq) + KCN
K4[Fe(CN)6]
CH3CN + H2O
CH3CONH2 + P2O5