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WBJEE Chemistry Test - 15 - JEE MCQ
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30 Questions MCQ Test WBJEE Sample Papers, Section Wise & Full Mock Tests 2025 - WBJEE Chemistry Test - 15
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WBJEE Chemistry Test - 15 - Question 1
HCN behaves as a very weak acid in aqueous medium whereas it acts as a strong acid in liquid ammonia because :
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WBJEE Chemistry Test - 15 - Question 4
A light greenish coloured salt was soluble in water. On passing H₂S into the solution, a black ppt. was obtained which dissolved readily in HCl. The metal ion present is
WBJEE Chemistry Test - 15 - Question 5
The energy of an orbit in a hydrogen atom is given by the relation
E = -(Constant/n2) kJ mol-1.
Which of the following properties represents the constant in the above relation?
WBJEE Chemistry Test - 15 - Question 9
The state of hybridisation of boron and oxygen atoms in boric acid molecule (H₃BO₃) are respectively
WBJEE Chemistry Test - 15 - Question 10
If bond enthalpies of H-H,Br-Br and H-Br bonds are 433 ,192 and 364 KJ mol-1 respectively ,The ∆Ho for the reaction H₂(g) + Br₂(g) →2HBr(g) is
WBJEE Chemistry Test - 15 - Question 11
The equilibrium constant in a reversible chemical reaction at a given temperature
WBJEE Chemistry Test - 15 - Question 12
A reaction involving two different reactants can never be
WBJEE Chemistry Test - 15 - Question 13
For a system in equilibrium, ∆G=0, under conditions of constant
WBJEE Chemistry Test - 15 - Question 14
Vanishing creams differ from other creams due to the presence of
WBJEE Chemistry Test - 15 - Question 15
The number and type of bonds between two carbon atoms in calcium carbide are
WBJEE Chemistry Test - 15 - Question 17
The right order of the solubility of sulphates of alkaline earth metals in water is
WBJEE Chemistry Test - 15 - Question 18
3.2 g of oxygen (At wt. = 16) and 0.2 g of hydrogen (At. wt. = 1) are placed in a 1.12 litre flask at 0oC. The total pressure of the gas mixture will be
WBJEE Chemistry Test - 15 - Question 24
When a slow neutron goes sufficently close to a U-235 nucleus, then the process which takes place is called
WBJEE Chemistry Test - 15 - Question 28
A, B, C are three element forming a part of compound in oxidation states of +2, +5 and -2 respectively. What could be the compound?
WBJEE Chemistry Test - 15 - Question 29
The interionic distance for cesium chloride cystal will be
WBJEE Chemistry Test - 15 - Question 30
Consider the following statements about dimethyl cyclohexanes :
1. trans-1,2-dimethylcyclohexane is more stable than the corresponding cis-isomer
2. cis-1,3-dimethylcyclohexane is an optically inactive meso form
3. trans-1,3-dimethylcyclohexane is more stable than the corresponding cis-isomer
4. cis-1,2-dimethylcyclohexane is an unresolvable racemic mixture
Which of the statements given above are correct ?
1. trans-1,2-dimethylcyclohexane is more stable than the corresponding cis-isomer
2. cis-1,3-dimethylcyclohexane is an optically inactive meso form
3. trans-1,3-dimethylcyclohexane is more stable than the corresponding cis-isomer
4. cis-1,2-dimethylcyclohexane is an unresolvable racemic mixture
Which of the statements given above are correct ?
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