The radio-active element used in heart pacemakers is ___________?
The radio-active element used in heart pacemakers is ___________?
A. Uranium
B. Deuterium
C. Plutonium
D. Radium
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The formula of palmitic acid_________________?
The formula of palmitic acid_________________?A. C15H31COOH
B. C13H27COOH
C. C17H33COOH
D. C17H35COOHEstimation of amounts of different components in a sample is________________?
Estimation of amounts of different components in a sample is________________?A. Quantitative analysis
B. Qualitative analysis
C. Stochiometery
D. Physical chemistryAlkali and alkaline earth metals impart colours when heated over burner. It is due to______________?
Alkali and alkaline earth metals impart colours when heated over burner. It is due to______________?A. Smaller electronegativity of alkali metals
B. Smaller ionic radius of these metals
C. De-excitation of electrons from higher energy levels to low energy level
D. Excitation of electrons from low energy levels to higher energy levelsPolyamides are synthetic polymers commonly known as___________?
Polyamides are synthetic polymers commonly known as___________?A. synthetic
B. Protein
C. Cellulose
D. NylonIf electricity is passed through CuSO4 solution by using Pt electrode then which of the following possible change occurs ?
If electricity is passed through CuSO4 solution by using Pt electrode then which of the following possible change occurs ?A. H2 is deposited at cathode
B. Colour of the solution becomes fade
C. Cu is deposited at anode
D. All are possibleWhich of the following is not characteristics of reversible reaction__________________?
Which of the following is not characteristics of reversible reaction__________________?A. whole amount of reactant does not change into product
B. chemical equilibrium is established
C. a catalyst changes the direction of reaction
D. rate of forward reaction decreases as reaction proceeds