MCQs
Total Questions : 99
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Answer: Option D. -> Both a and b
BOTH NACL AND MGO ARE AN ELECTROVALENT COMPOUND FORMED BY THE COMPLETE TRANSFER OF ELECTRONS FROM ONE ATOM TO ANOTHER. NH₃ IS A COVALENT COMPOUND.
BOTH NACL AND MGO ARE AN ELECTROVALENT COMPOUND FORMED BY THE COMPLETE TRANSFER OF ELECTRONS FROM ONE ATOM TO ANOTHER. NH₃ IS A COVALENT COMPOUND.
Answer: Option C. -> Oxalic acid – Ant sting
AN ANT STING CONTAINS METHANOIC ACID. THE STING LEAVES AN ACID WHICH CAUSES IRRITATION. USE OF A MILD BASE LIKE BAKING SODA ON THE STUNG AREA GIVES RELIEF.
AN ANT STING CONTAINS METHANOIC ACID. THE STING LEAVES AN ACID WHICH CAUSES IRRITATION. USE OF A MILD BASE LIKE BAKING SODA ON THE STUNG AREA GIVES RELIEF.
Answer: Option D. -> 107°
THE BOND ANGLE IN CASE OF AMMONIA MOLECULE IS 107° AND THE MOLECULAR GEOMETRY IS TRIGONAL PYRAMIDAL. THE NUMBER OF BOND PAIRS IN AMMONIA IS 3 AND LONE PAIR IS 1.
THE BOND ANGLE IN CASE OF AMMONIA MOLECULE IS 107° AND THE MOLECULAR GEOMETRY IS TRIGONAL PYRAMIDAL. THE NUMBER OF BOND PAIRS IN AMMONIA IS 3 AND LONE PAIR IS 1.
Answer: Option C. -> Both a and b
HYDROGEN BOND IS A WEAK BOND AND IS QUITE SMALL AS COMPARED TO THE COVALENT BOND. IT IS DUE TO HYDROGEN BONDING ONLY THAT WATER EXISTS AS A LIQUID.
HYDROGEN BOND IS A WEAK BOND AND IS QUITE SMALL AS COMPARED TO THE COVALENT BOND. IT IS DUE TO HYDROGEN BONDING ONLY THAT WATER EXISTS AS A LIQUID.
Answer: Option A. -> 0
THE DIPOLE MOMENT IN BF₃ MOLECULE IS 0 BECAUSE THE TWO EQUAL BOND DIPOLES POINT IN OPPOSITE DIRECTIONS AND CANCEL THE EFFECT OF EACH OTHER.
THE DIPOLE MOMENT IN BF₃ MOLECULE IS 0 BECAUSE THE TWO EQUAL BOND DIPOLES POINT IN OPPOSITE DIRECTIONS AND CANCEL THE EFFECT OF EACH OTHER.
Answer: Option C. -> a platinum electrode coated with platinum black
THE STANDARD HYDROGEN ELECTRODE CONSISTS OF A PLATINUM ELECTRODE COATED WITH PLATINUM BLACK. ACCORDING TO CONVENTION, A HALF-CELL CALLED STANDARD HYDROGEN ELECTRODE IS ASSIGNED A ZERO POTENTIAL AT ALL TEMPERATURES CORRESPONDING TO THE REACTION.
THE STANDARD HYDROGEN ELECTRODE CONSISTS OF A PLATINUM ELECTRODE COATED WITH PLATINUM BLACK. ACCORDING TO CONVENTION, A HALF-CELL CALLED STANDARD HYDROGEN ELECTRODE IS ASSIGNED A ZERO POTENTIAL AT ALL TEMPERATURES CORRESPONDING TO THE REACTION.
Answer: Option B. -> difference between the electrode potentials of the cathode and anode
THE CELL POTENTIAL IS THE DIFFERENCE BETWEEN THE ELECTRODE POTENTIALS (REDUCTION POTENTIALS) OF THE CATHODE AND ANODE. IT IS MEASURED IN VOLTS.
THE CELL POTENTIAL IS THE DIFFERENCE BETWEEN THE ELECTRODE POTENTIALS (REDUCTION POTENTIALS) OF THE CATHODE AND ANODE. IT IS MEASURED IN VOLTS.
Answer: Option C. -> increases steeply
IN CASE OF WEAK ELECTROLYTE, MOLAR CONDUCTIVITY INCREASES STEEPLY ON DILUTION, ESPECIALLY NEAR LOWER CONCENTRATIONS. THE WEAK ELECTROLYTES HAVE LOWER DEGREE OF DISSOCIATION AT HIGHER CONCENTRATIONS.
IN CASE OF WEAK ELECTROLYTE, MOLAR CONDUCTIVITY INCREASES STEEPLY ON DILUTION, ESPECIALLY NEAR LOWER CONCENTRATIONS. THE WEAK ELECTROLYTES HAVE LOWER DEGREE OF DISSOCIATION AT HIGHER CONCENTRATIONS.
Answer: Option B. -> Kohlrausch law
KOHLRAUSCH LAW OF INDEPENDENT MIGRATION OF IONS STATES THAT LIMITING MOLAR CONDUCTIVITY OF AN ELECTROLYTE CAN BE REPRESENTED AS THE SUM OF THE INDIVIDUAL CONTRIBUTIONS OF THE ANION AND CATION OF THE ELECTROLYTE.
KOHLRAUSCH LAW OF INDEPENDENT MIGRATION OF IONS STATES THAT LIMITING MOLAR CONDUCTIVITY OF AN ELECTROLYTE CAN BE REPRESENTED AS THE SUM OF THE INDIVIDUAL CONTRIBUTIONS OF THE ANION AND CATION OF THE ELECTROLYTE.
Answer: Option B. -> Sulphuric Acid
LEAD STORAGE BATTERY IS AN EXAMPLE OF SECONDARY BATTERY. IT CONSISTS OF A LEAD ANODE AND A GRID OF LEAD PACKED WITH LEAD DIOXIDE (PBO2 ) AS CATHODE. A 38% SOLUTION OF SULPHURIC ACID IS USED AS AN ELECTROLYTE.
LEAD STORAGE BATTERY IS AN EXAMPLE OF SECONDARY BATTERY. IT CONSISTS OF A LEAD ANODE AND A GRID OF LEAD PACKED WITH LEAD DIOXIDE (PBO2 ) AS CATHODE. A 38% SOLUTION OF SULPHURIC ACID IS USED AS AN ELECTROLYTE.
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