1708 + Interview Questions in Chemistry Page 16 InterviewSolution

751.	An amount of 1.00 g of a gaseous compound of boron and hydrogen occupies 0.820 litre at 1.00 atm and at 3∘C. The compound is (R=0.0820 L atm mol−1K−1, Atomic weight: H = 1.0, B = 10.8)
Answer» An amount of 1.00 g of a gaseous compound of boron and hydrogen occupies 0.820 litre at 1.00 atm and at $3^{\circ} C .$ The compound is ( $R = 0.0820 L$ atm mol $^{- 1} K^{- 1}$ , Atomic weight: H = 1.0, B = 10.8)

Discussion

752.	Elements after atomic number 92 are called
Answer» Elements after atomic number 92 are called

Discussion

753.	If an endothermic reaction is non spontaneous, then
Answer» If an endothermic reaction is non spontaneous, then

Discussion

754.	Which of the following is an example of cumulated polyene?
Answer» Which of the following is an example of cumulated polyene?

Discussion

755.	Which of the following explains the particle like nature of light?
Answer» Which of the following explains the particle like nature of light?

Discussion

756.	An ionizing solvent has
Answer» An ionizing solvent has

Discussion

757.	The final product B in the reaction would be:
Answer» The final product B in the reaction would be:

Discussion

758.	The radius ratio of Cs+ to Cl− is 0.90. If the radius of Cl− ion is 1.80 ∘A, the false statement regarding the CsCl structure is ?
Answer» The radius ratio of $C s^{+}$ to $C l^{-}$ is 0.90. If the radius of $C l^{-}$ ion is $1.80 \circ A$ , the false statement regarding the CsCl structure is ?

Discussion

759.	Which of the following is a pale yellow-green gas at room temperature?
Answer» Which of the following is a pale yellow-green gas at room temperature?

Discussion

760.	Freon-12 is:
Answer» Freon-12 is:

Discussion

761.	When a substance is dissolved in a solvent, the vapour pressure of solvent decreases. It brings
Answer» When a substance is dissolved in a solvent, the vapour pressure of solvent decreases. It brings

Discussion

762.	The number of resonance structures for N is___
Answer» The number of resonance structures for N is___

762.

The number of resonance structures for N is___

Answer»

The number of resonance structures for N is___

Discussion

763.	Which solution will show the maximum vapour pressure at 300 K?
Answer» Which solution will show the maximum vapour pressure at 300 K?

Discussion

764.	Mixing of 0.1 mol of NaOH and 0.1 mol of acetic acid in one litre of water results into
Answer» Mixing of 0.1 mol of NaOH and 0.1 mol of acetic acid in one litre of water results into

Discussion

765.	Find the total number of 2c−2e and 3c−2e bonds in Be(BH4)2 respectively.
Answer» Find the total number of $2 c - 2 e$ and $3 c - 2 e$ bonds in $B e (B H_{4})_{2}$ respectively.

Discussion

766.	Equal volume of 0.02 M AgNO3 and 0.02 M HCN were mixed. Calculate [Ag+] at equilibrium assuming no cynao-complex formation.Given : Ksp(AgCN)=2.2×10−16, Ka (HCN)=6.2×10−10.
Answer» Equal volume of $0.02 M$ $A g N O_{3}$ and $0.02 M H C N$ were mixed. Calculate $[A g^{+}]$ at equilibrium assuming no cynao-complex formation. Given : $K_{s p} (A g C N) = 2.2 \times 10^{- 16}, K_{a} (H C N) = 6.2 \times 10^{- 10} .$

Discussion

767.	Which of the following nuclides is the least stable ?
Answer» Which of the following nuclides is the least stable ?

Discussion

768.	Among the electrolytes given below K2SO4, BaCl2, Al2(SO4)3 and NH4Cl which will be the most effective coagulating agent for Sb2S3 sol?
Answer» Among the electrolytes given below $K_{2} S O_{4}, B a C l_{2}, A l_{2} (S O_{4})_{3}$ and $N H_{4} C l$ which will be the most effective coagulating agent for $S b_{2} S_{3}$ sol?

Discussion

769.	The total number(s) of stable conformers with non-zero dipole moment for the following compound is (are)
Answer» The total number(s) of stable conformers with non-zero dipole moment for the following compound is (are)

769.

The total number(s) of stable conformers with non-zero dipole moment for the following compound is (are)

Answer»

The total number(s) of stable conformers with non-zero dipole moment for the following compound is (are)

Discussion

770.	Ammonia is more basic than phosphine because
Answer» Ammonia is more basic than phosphine because

Discussion

771.	Ortho-dihydroxy benzene is
Answer» Ortho-dihydroxy benzene is

Discussion

772.	The correct IUPAC name of
Answer» The correct IUPAC name of

Discussion

773.	In the reaction given below, the major product formed is?
Answer» In the reaction given below, the major product formed is?

Discussion

774.	Candles may contain
Answer» Candles may contain

Discussion

775.	IE1 and IE2 of magnesium are 7.6 eV and 15.0 eV respectively. The amount of energy in kJ needed to convert all the atoms of magnesium into Mg2+ ions present in 36 mg of magnesium vapour will be:[Given: 1 eV=96.5 kJ mol–1].
Answer» $I E_{1}$ and $I E_{2}$ of magnesium are $7.6 eV$ and $15.0 eV$ respectively. The amount of energy in $kJ$ needed to convert all the atoms of magnesium into $M g^{2 +}$ ions present in $36 mg$ of magnesium vapour will be: [Given: $1 eV = 96.5 {kJ mol}^{- 1}$ ].

Discussion

776.	The oxidizing power of the halogens varies in the order
Answer» The oxidizing power of the halogens varies in the order

Discussion

777.	Chromium metal crystallises with a body-centred cubic lattice. The length of the unit cell edge is found to be 287 pm. Calculate the atomic radius. What would be the density of chromium in g/cc?
Answer» Chromium metal crystallises with a body-centred cubic lattice. The length of the unit cell edge is found to be 287 pm. Calculate the atomic radius. What would be the density of chromium in g/cc?

Discussion

778.	Coconut oil upon alkaline hydrolysis gives[MP PET 1991; AFMC 2000; KCET 2001; BCECE 2005]
Answer» Coconut oil upon alkaline hydrolysis gives[MP PET 1991; AFMC 2000; KCET 2001; BCECE 2005]

Discussion

779.	Which of the following groups does not exhibit +M effect when attached with benzene?
Answer» Which of the following groups does not exhibit +M effect when attached with benzene?

Discussion

780.	An inorganic compound (A) is a strong reducing agent. Its hydrolysis in water gives a white turbidity (B). Aqueous solution of (A) gives a white precipitate (C) with NaOH solution which is soluble in excess of NaOH. (A) reduces auric chloride to produce purple of cassius. (A) also reduces iodine and gives chromyl chloride test. What are (A) to (C) and give the chemical reactions.
Answer» An inorganic compound (A) is a strong reducing agent. Its hydrolysis in water gives a white turbidity (B). Aqueous solution of (A) gives a white precipitate (C) with NaOH solution which is soluble in excess of NaOH. (A) reduces auric chloride to produce purple of cassius. (A) also reduces iodine and gives chromyl chloride test. What are (A) to (C) and give the chemical reactions.

Discussion

781.	Potassium crystallizes in a bcc lattice, hence thecoordination number of potassium in potassium metal is[KCEE1993]
Answer» Potassium crystallizes in a bcc lattice, hence the coordination number of potassium in potassium metal is [KCEE 1993]

Discussion

782.	The R.M.S. velocity of hydrogen is √7 times the R.M.S. velocity of Nitrogen. If T is the temperature of the Gas, then
Answer» The R.M.S. velocity of hydrogen is $\sqrt{7}$ times the R.M.S. velocity of Nitrogen. If T is the temperature of the Gas, then

Discussion

783.	IUPAC name of the following compound is
Answer» IUPAC name of the following compound is

783.

IUPAC name of the following compound is

Answer»

IUPAC name of the following compound is

Discussion

784.	CsCl has ______ Coordination.
Answer» CsCl has ______ Coordination.

Discussion

785.	The crystalline form of borax has
Answer» The crystalline form of borax has

Discussion

786.	Solid AgNO3 is added to a solution which is 0.1 M in Cl− and 0.1 M in CrO2−4. If Ksp values for AgCl and Ag2CrO4 solutions are 1.7×10−10 and 1.9×10−12 respectively. Find the minimum concentration of Cl− when Ag2CrO4 starts precipitating.
Answer» Solid $A g N O_{3}$ is added to a solution which is $0.1 M$ in $C l^{-}$ and $0.1 M$ in $C r O_{4}^{2 -}$ . If $K_{s p}$ values for $A g C l$ and $A g_{2} C r O_{4}$ solutions are $1.7 \times 10^{- 10}$ and $1.9 \times 10^{- 12}$ respectively. Find the minimum concentration of $C l^{-}$ when $A g_{2} C r O_{4}$ starts precipitating.

Discussion

787.	The unit of electrochemical equivalent is [EAMCET 1980]
Answer» The unit of electrochemical equivalent is [EAMCET 1980]

787.

The unit of electrochemical equivalent is [EAMCET 1980]

Answer»

The unit of electrochemical equivalent is

[EAMCET 1980]

Discussion

788.	Which of the following is the staggered conformation for rotation about C1 and C2 bond in the following structure?
Answer» Which of the following is the staggered conformation for rotation about $C_{1}$ and $C_{2}$ bond in the following structure?

Discussion

789.	Basic Lead carbonate is also known as
Answer» Basic Lead carbonate is also known as

Discussion

790.	They yield of acid amide in the reaction, RCOCl+NH3→RCONH2 , is maximum when
Answer» They yield of acid amide in the reaction, $R C O C l + N H_{3} \to R C O N H_{2}$ , is maximum when

Discussion

791.	Concentrated nitric acid, upon long standing, turns yellow-brown due to the formation of:
Answer» Concentrated nitric acid, upon long standing, turns yellow-brown due to the formation of:

Discussion

792.	On a ship sailing in the Pacific ocean, where the temperature is 23.4∘C, a balloon is filled with 2 L of air. What will be the volume of the balloon when the ship reaches the Indian ocean, where the temperature is 26.1∘C?
Answer» On a ship sailing in the Pacific ocean, where the temperature is ${23.4}^{\circ} C$ , a balloon is filled with $2 L$ of air. What will be the volume of the balloon when the ship reaches the Indian ocean, where the temperature is ${26.1}^{\circ} C$ ?

Discussion

793.	For the reaction4NH3(g)+5O2(g)⇌4NO(g)+6H2O(g),, the expression of Kc will be:
Answer» For the reaction $4 N H_{3} (g) + 5 O_{2} (g) ⇌ 4 N O (g) + 6 H_{2} O (g),$ , the expression of $K_{c}$ will be:

Discussion

794.	Baeyer’s reagent is used for detection of
Answer» Baeyer’s reagent is used for detection of

Discussion

795.	Which of the following species has a regular tetrahedral structure?(Atomic number: B=5,S=16,O=8,Xe=54)
Answer» Which of the following species has a regular tetrahedral structure? (Atomic number: $B = 5, S = 16, O = 8, X e = 54)$

Discussion

796.	Which of the following compounds is most polar?
Answer» Which of the following compounds is most polar?

Discussion

797.	The name of following compound is
Answer» The name of following compound is

797.

The name of following compound is

Answer»

The name of following compound is

Discussion

798.	Under the same conditions, the rates of diffusion of two gases are in the ratio 1 : 4. The ratio of their vapour densities is ___.
Answer» Under the same conditions, the rates of diffusion of two gases are in the ratio 1 : 4. The ratio of their vapour densities is ___.

Discussion

799.	The de Broglie wavelength of a sand grain weighing 2 mg blown by a wind of 10 m/s is:
Answer» The de Broglie wavelength of a sand grain weighing 2 mg blown by a wind of 10 m/s is:

Discussion

800.	Internal energy is an example of
Answer» Internal energy is an example of

Discussion

Explore topic-wise InterviewSolutions in .

An amount of 1.00 g of a gaseous compound of boron and hydrogen occupies 0.820 litre at 1.00 atm and at 3∘C. The compound is (R=0.0820 L atm mol−1K−1, Atomic weight: H = 1.0, B = 10.8)

Elements after atomic number 92 are called

If an endothermic reaction is non spontaneous, then

Which of the following is an example of cumulated polyene?

Which of the following explains the particle like nature of light?

An ionizing solvent has

The final product B in the reaction would be:

The radius ratio of Cs+ to Cl− is 0.90. If the radius of Cl− ion is 1.80 ∘A, the false statement regarding the CsCl structure is ?

Which of the following is a pale yellow-green gas at room temperature?

Freon-12 is:

When a substance is dissolved in a solvent, the vapour pressure of solvent decreases. It brings

The number of resonance structures for N is___

Which solution will show the maximum vapour pressure at 300 K?

Mixing of 0.1 mol of NaOH and 0.1 mol of acetic acid in one litre of water results into

Find the total number of 2c−2e and 3c−2e bonds in Be(BH4)2 respectively.

Equal volume of 0.02 M AgNO3 and 0.02 M HCN were mixed. Calculate [Ag+] at equilibrium assuming no cynao-complex formation.Given : Ksp(AgCN)=2.2×10−16, Ka (HCN)=6.2×10−10.

Which of the following nuclides is the least stable ?

Among the electrolytes given below K2SO4, BaCl2, Al2(SO4)3 and NH4Cl which will be the most effective coagulating agent for Sb2S3 sol?

The total number(s) of stable conformers with non-zero dipole moment for the following compound is (are)

Ammonia is more basic than phosphine because

Ortho-dihydroxy benzene is

The correct IUPAC name of

In the reaction given below, the major product formed is?

Candles may contain

IE1 and IE2 of magnesium are 7.6 eV and 15.0 eV respectively. The amount of energy in kJ needed to convert all the atoms of magnesium into Mg2+ ions present in 36 mg of magnesium vapour will be:[Given: 1 eV=96.5 kJ mol–1].

The oxidizing power of the halogens varies in the order

Chromium metal crystallises with a body-centred cubic lattice. The length of the unit cell edge is found to be 287 pm. Calculate the atomic radius. What would be the density of chromium in g/cc?

Coconut oil upon alkaline hydrolysis gives[MP PET 1991; AFMC 2000; KCET 2001; BCECE 2005]

Which of the following groups does not exhibit +M effect when attached with benzene?

Potassium crystallizes in a bcc lattice, hence thecoordination number of potassium in potassium metal is[KCEE1993]

The R.M.S. velocity of hydrogen is √7 times the R.M.S. velocity of Nitrogen. If T is the temperature of the Gas, then

IUPAC name of the following compound is

CsCl has ______ Coordination.

The crystalline form of borax has

Solid AgNO3 is added to a solution which is 0.1 M in Cl− and 0.1 M in CrO2−4. If Ksp values for AgCl and Ag2CrO4 solutions are 1.7×10−10 and 1.9×10−12 respectively. Find the minimum concentration of Cl− when Ag2CrO4 starts precipitating.

The unit of electrochemical equivalent is [EAMCET 1980]

Which of the following is the staggered conformation for rotation about C1 and C2 bond in the following structure?

Basic Lead carbonate is also known as

They yield of acid amide in the reaction, RCOCl+NH3→RCONH2 , is maximum when

Concentrated nitric acid, upon long standing, turns yellow-brown due to the formation of:

On a ship sailing in the Pacific ocean, where the temperature is 23.4∘C, a balloon is filled with 2 L of air. What will be the volume of the balloon when the ship reaches the Indian ocean, where the temperature is 26.1∘C?

For the reaction4NH3(g)+5O2(g)⇌4NO(g)+6H2O(g),, the expression of Kc will be:

Baeyer’s reagent is used for detection of

Which of the following species has a regular tetrahedral structure?(Atomic number: B=5,S=16,O=8,Xe=54)

Which of the following compounds is most polar?

The name of following compound is

Under the same conditions, the rates of diffusion of two gases are in the ratio 1 : 4. The ratio of their vapour densities is ___.

The de Broglie wavelength of a sand grain weighing 2 mg blown by a wind of 10 m/s is:

Internal energy is an example of