2600 + Interview Questions in Chemistry Page 17 InterviewSolution

801.	Which form of radioactivity is most penetrating?
Answer» Which form of radioactivity is most penetrating?

Discussion

802.	Which of the following halides is the least stable?
Answer» Which of the following halides is the least stable?

Discussion

803.	Which one of the following compounds has sp2 hybridization?
Answer» Which one of the following compounds has ${s p}^{2}$ hybridization?

Discussion

804.	A certain alkaloid has 70.8%C,6.2%H and 4.1% of N and rest O. The empirical formula is
Answer» A certain alkaloid has $70.8 % C, 6.2 % H$ and $4.1 %$ of N and rest O. The empirical formula is

Discussion

805.	Among the following, the compound that is both paramagnetic and coloured is
Answer» Among the following, the compound that is both paramagnetic and coloured is

Discussion

806.	1 g of a metal on treatment with a dilute mineral acid gave 1242 mL of hydrogen at STP. Calculate the equivalent weight of the metal.
Answer» $1 g$ of a metal on treatment with a dilute mineral acid gave $1242 mL$ of hydrogen at STP. Calculate the equivalent weight of the metal.

Discussion

807.	Which of the following will show optical activity?
Answer» Which of the following will show optical activity?

Discussion

808.	Calculate the formality of NaCl solution having 1.78 gm solute dissolved in 178 ml solution.
Answer» Calculate the formality of NaCl solution having 1.78 gm solute dissolved in 178 ml solution.

Discussion

809.	If the threshold wavelength (λ∘) for the ejection of electrons from a metal is 330 nm, then the work function for the photoelectric emission is:
Answer» If the threshold wavelength $(λ_{\circ})$ for the ejection of electrons from a metal is $330 nm$ , then the work function for the photoelectric emission is:

Discussion

810.	6×10−3mol K2Cr2O7 reacts completely with 9×10−3 mol of Xn+ to give XO−3 and Cr+3 The valve of n is:
Answer» 6 $\times$ $10^{- 3}$ mol $K_{2} C r_{2} O_{7}$ reacts completely with 9 $\times$ $10^{- 3}$ mol of $X^{n} +$ to give $X O_{3}^{-}$ and $C r^{+ 3}$ The valve of n is:

Discussion

811.	Calculate the degree of dissociation of HI as 2HI⇌H2+I2 at 450 oC , if the equilibrium constant for the dissociation reaction is 0.263.
Answer» Calculate the degree of dissociation of $H I$ as $2 H I ⇌ H_{2} + I_{2}$ at $450^{o} C$ , if the equilibrium constant for the dissociation reaction is 0.263.

Discussion

812.	The correct order of decreasing polarisability of ion is :
Answer» The correct order of decreasing polarisability of ion is :

Discussion

813.	The standard enthalpy of formation of NH3 is 46.0 kJ mol−1. If the enthalpy of formation of H2 from its atom is −436 kJ mol−1 and that of N2 is −712 kJ mol−1, the average bond enthalpy of N−H bond in NH3 is
Answer» The standard enthalpy of formation of $N H_{3}$ is $46.0 k J m o l^{- 1}$ . If the enthalpy of formation of $H_{2}$ from its atom is $- 436 k J m o l^{- 1}$ and that of $N_{2}$ is $- 712 k J m o l^{- 1}$ , the average bond enthalpy of $N - H$ bond in $N H_{3}$ is

Discussion

814.	The oxidant which is used as an antiseptic is:
Answer» The oxidant which is used as an antiseptic is:

Discussion

815.	A 300 g, 30% (w/w) NaOH solution is mixed with 500 g 40% (w/w) NaOH solution. What is % (w/v) NaOH, If density of final solution is 2 g/ml.
Answer» A $300 g$ , $30 %$ (w/w) NaOH solution is mixed with $500 g$ $40 %$ (w/w) $N a O H$ solution. What is $%$ (w/v) $N a O H$ , If density of final solution is $2 g / m l$ .

Discussion

816.	ClO2+SbO−2→ClO−2+Sb(OH)−6The balanced form of the above reaction in basic medium using oxidation number method is:
Answer» $C l O_{2} + S b O_{2}^{-} \to C l O_{2}^{-} + S b (O H)_{6}^{-}$ The balanced form of the above reaction in basic medium using oxidation number method is:

Discussion

817.	When excess of AgNO3 is treated with KI solution, AgI forms
Answer» When excess of $A g N O_{3}$ is treated with KI solution, AgI forms

Discussion

818.	Conjugate base of Hydrazoic acid is
Answer» Conjugate base of Hydrazoic acid is

Discussion

819.	The nucleus AZY goes through gamma decay. What shall be the product?
Answer» The nucleus $_{Z}^{A} Y$ goes through gamma decay. What shall be the product?

Discussion

820.	Which compound is zero valency metal complex
Answer» Which compound is zero valency metal complex

Discussion

821.	The molecular formula for Heptane is :
Answer» The molecular formula for Heptane is :

Discussion

822.	Observe the following reaction, and select the correct option.
Answer» Observe the following reaction, and select the correct option.

Discussion

823.	When is deviation more in the behaviour of a gas from the ideal gas equation PV=nRT
Answer» When is deviation more in the behaviour of a gas from the ideal gas equation PV=nRT

823.

When is deviation more in the behaviour of a gas from the ideal gas equation PV=nRT

Answer»

When is deviation more in the behaviour of a gas from the ideal gas equation PV=nRT

Discussion

824.	Calculate the equilibrium concentration ratio of C to A, if 2 moles each of A and B are allowed to come to equilibrium at 300 K.A (g)+B (g)⇌C (g)+D (g)ΔG∘=−1380 cal/mol
Answer» Calculate the equilibrium concentration ratio of $C t o A$ , if $2$ moles each of $A$ and $B$ are allowed to come to equilibrium at $300 K$ . $A (g) + B (g) ⇌ C (g) + D (g)$ $Δ G^{\circ} = - 1380 c a l / m o l$

Discussion

825.	What is therole of a catalyst in a catalysed reaction[MP PMT 1996; Pb. PMT 2000;UPSEAT 2001,02]
Answer» What is the role of a catalyst in a catalysed reaction [MP PMT 1996; Pb. PMT 2000;UPSEAT 2001,02]

825.

What is therole of a catalyst in a catalysed reaction[MP PMT 1996; Pb. PMT 2000;UPSEAT 2001,02]

Answer»

What is the
role of a catalyst in a catalysed reaction

[MP PMT 1996; Pb. PMT 2000;UPSEAT 2001,02]

Discussion

826.	Whichone of the following is a good conductor of electricity[MP PMT1994; AFMC 2002]
Answer» Which one of the following is a good conductor of electricity [MP PMT 1994; AFMC 2002]

826.

Whichone of the following is a good conductor of electricity[MP PMT1994; AFMC 2002]

Answer»

Which
one of the following is a good conductor of electricity

[MP PMT
1994; AFMC 2002]

Discussion

827.	Avogadro’s number represents the number of atoms in
Answer» Avogadro’s number represents the number of atoms in

Discussion

828.	Two elements A and B combine to form compounds X and Y. For a fixed mass of A, the masses of B that combine to form the compounds X and Y are in the ratio 3:7. If in the compound X, 4g of A combines with 12 g of B, then in compound Y, 8 g of A will combine with _______ g of B.
Answer» Two elements A and B combine to form compounds X and Y. For a fixed mass of A, the masses of B that combine to form the compounds X and Y are in the ratio $3 : 7$ . If in the compound X, $4 g$ of A combines with $12 g$ of B, then in compound Y, $8 g$ of A will combine with _______ $g$ of B.

Discussion

829.	A piece of zinc at a temperature of 20oC weighing 65.38 g is dropped into 180 g of boiling water (T=100oC). The specific heat of zinc is 0.4 J g−1 ∘C−1 and that of water is 4.2 J g−1 oC−1. What is the final common temperature reached by both the zinc and water?
Answer» A piece of zinc at a temperature of $20^{o} C$ weighing 65.38 g is dropped into 180 g of boiling water $(T = 100^{o} C) .$ The specific heat of zinc is $0.4 J g^{- 1 \circ} C^{- 1}$ and that of water is $4.2 J g^{- 1 o} C^{- 1} .$ What is the final common temperature reached by both the zinc and water?

Discussion

830.	Decreasing order of acidic strength of different (-OH) groups is
Answer» Decreasing order of acidic strength of different (-OH) groups is

Discussion

831.	Total number of α – hydrogens in the given compound is:
Answer» Total number of α – hydrogens in the given compound is:

Discussion

832.	Which of the following compounds has the most acidic hydrogen?
Answer» Which of the following compounds has the most acidic hydrogen?

Discussion

833.	The electronic configuration of Ti is 1s2 2s2 2p6 3s2 3p6 3d2 4s2 and it represents
Answer» The electronic configuration of Ti is 1 $s^{2}$ 2 $s^{2}$ 2 $p^{6}$ 3 $s^{2}$ 3 $p^{6}$ 3 $d^{2}$ 4 $s^{2}$ and it represents

Discussion

834.	De-Broglie wavelength of an electron travelling with speed equal to 1% of the speed of light is?
Answer» De-Broglie wavelength of an electron travelling with speed equal to $1$ % of the speed of light is?

Discussion

835.	Polarization is an important phenomenon which is helpful in determination of covalent nature of compound. With the help of Fajan's rule one can easily predict the nature of compound.The correct increasing covalent nature is:
Answer» Polarization is an important phenomenon which is helpful in determination of covalent nature of compound. With the help of Fajan's rule one can easily predict the nature of compound. The correct increasing covalent nature is:

Discussion

836.	A Boron mineral have pentaborate anion whose molecular formula is [B5O6(OH)4]−. The number of B−O−B linkage present in one molecule of the mineral are
Answer» A Boron mineral have pentaborate anion whose molecular formula is $[B_{5} O_{6} (O H)_{4}]^{-}$ . The number of $B - O - B$ linkage present in one molecule of the mineral are

Discussion

837.	The correct order of wavelengths of absorption is:
Answer» The correct order of wavelengths of absorption is:

Discussion

838.	In the gulabjamun experiment that you have seen, which do you think is the adsorbate and which is the adsorbent?
Answer» In the gulabjamun experiment that you have seen, which do you think is the adsorbate and which is the adsorbent?

838.

In the gulabjamun experiment that you have seen, which do you think is the adsorbate and which is the adsorbent?

Answer»

In the gulabjamun experiment that you have seen, which do you think is the adsorbate and which is the adsorbent?

Discussion

839.	0.2 M solution of formic acid is ionized 3.2%, its ionization constant is
Answer» 0.2 M solution of formic acid is ionized 3.2 $%$ , its ionization constant is

Discussion

840.	The correct statement(s) regarding defects in solids is / are
Answer» The correct statement(s) regarding defects in solids is / are

Discussion

841.	Formaldehyde reacts with ammonia to give
Answer» Formaldehyde reacts with ammonia to give

Discussion

842.	Calculate the wavelength of the radiation that would cause photo dissociation of chlorine molecule if the Cl−Cl bond energy is 240 kJ/mol.(take Avogadro's number to be 6×1023, and Planck's constant (h) = 6.6×10−34 J s)
Answer» Calculate the wavelength of the radiation that would cause photo dissociation of chlorine molecule if the $C l - C l$ bond energy is $240 kJ/mol$ . (take Avogadro's number to be $6 \times 10^{23}$ , and Planck's constant (h) = $6.6 \times 10^{- 34} J s$ )

Discussion

843.	In each of the following questions, an Assertion (A) is followed by a corresponding Reason (R). Use the following keys to choose the appropriate answer. Assertion (A): If 30 mL of H2 and 20 mL of O2 react to form water, 5 mL of H2 is left at the end of the reaction. Reason (R): H2 is the limiting reagent.
Answer» In each of the following questions, an Assertion (A) is followed by a corresponding Reason (R). Use the following keys to choose the appropriate answer. Assertion (A): If 30 mL of $H_{2}$ and 20 mL of $O_{2}$ react to form water, 5 mL of $H_{2}$ is left at the end of the reaction. Reason (R): $H_{2}$ is the limiting reagent.

Discussion

844.	A catalyst is a substance [IIT 1983]
Answer» A catalyst is a substance [IIT 1983]

Discussion

845.	Which of the following reaction will give Hofmann product as major product?
Answer» Which of the following reaction will give Hofmann product as major product?

Discussion

846.	Which of following represent β −hydroxybutyrate− co− β −hydroxy valarate ?
Answer» $W h i c h o f f o l l o w i n g r e p r e s e n t β - h y d r o x y b u t y r a t e - c o - β - h y d r o x y v a l a r a t e ?$

Discussion

847.	If the speed of electron in first Bohr orbit of hydrogen be ′x′, then speed of the electron in second orbit of He+ is :
Answer» If the speed of electron in first Bohr orbit of hydrogen be $^{'} x^{'}$ , then speed of the electron in second orbit of $H e^{+}$ is :

Discussion

848.	Acetophenone on reduction with Zn/Hg in the presence of HCl gives
Answer» Acetophenone on reduction with Zn/Hg in the presence of HCl gives

Discussion

849.	The free energy of formation of NO is 78 kJ mol−1 at the temperature of 1000 K. What is the equilibrium constant for this reaction at 1000 K?12N2(g)+12O2(g)⇌NO(g)
Answer» The free energy of formation of NO is $78 k J m o l^{- 1}$ at the temperature of $1000 K$ . What is the equilibrium constant for this reaction at $1000 K$ ? $\frac{1}{2} N_{2} (g) + \frac{1}{2} O_{2} (g) ⇌ N O (g)$

Discussion

850.	Which of the following is incorrect for carbene?
Answer» Which of the following is incorrect for carbene?

Discussion

Explore topic-wise InterviewSolutions in .

Which form of radioactivity is most penetrating?

Which of the following halides is the least stable?

Which one of the following compounds has sp2 hybridization?

A certain alkaloid has 70.8%C,6.2%H and 4.1% of N and rest O. The empirical formula is

Among the following, the compound that is both paramagnetic and coloured is

1 g of a metal on treatment with a dilute mineral acid gave 1242 mL of hydrogen at STP. Calculate the equivalent weight of the metal.

Which of the following will show optical activity?

Calculate the formality of NaCl solution having 1.78 gm solute dissolved in 178 ml solution.

If the threshold wavelength (λ∘) for the ejection of electrons from a metal is 330 nm, then the work function for the photoelectric emission is:

6×10−3mol K2Cr2O7 reacts completely with 9×10−3 mol of Xn+ to give XO−3 and Cr+3 The valve of n is:

Calculate the degree of dissociation of HI as 2HI⇌H2+I2 at 450 oC , if the equilibrium constant for the dissociation reaction is 0.263.

The correct order of decreasing polarisability of ion is :

The standard enthalpy of formation of NH3 is 46.0 kJ mol−1. If the enthalpy of formation of H2 from its atom is −436 kJ mol−1 and that of N2 is −712 kJ mol−1, the average bond enthalpy of N−H bond in NH3 is

The oxidant which is used as an antiseptic is:

A 300 g, 30% (w/w) NaOH solution is mixed with 500 g 40% (w/w) NaOH solution. What is % (w/v) NaOH, If density of final solution is 2 g/ml.

ClO2+SbO−2→ClO−2+Sb(OH)−6The balanced form of the above reaction in basic medium using oxidation number method is:

When excess of AgNO3 is treated with KI solution, AgI forms

Conjugate base of Hydrazoic acid is

The nucleus AZY goes through gamma decay. What shall be the product?

Which compound is zero valency metal complex

The molecular formula for Heptane is :

Observe the following reaction, and select the correct option.

When is deviation more in the behaviour of a gas from the ideal gas equation PV=nRT

Calculate the equilibrium concentration ratio of C to A, if 2 moles each of A and B are allowed to come to equilibrium at 300 K.A (g)+B (g)⇌C (g)+D (g)ΔG∘=−1380 cal/mol

What is therole of a catalyst in a catalysed reaction[MP PMT 1996; Pb. PMT 2000;UPSEAT 2001,02]

Whichone of the following is a good conductor of electricity[MP PMT1994; AFMC 2002]

Avogadro’s number represents the number of atoms in

Two elements A and B combine to form compounds X and Y. For a fixed mass of A, the masses of B that combine to form the compounds X and Y are in the ratio 3:7. If in the compound X, 4g of A combines with 12 g of B, then in compound Y, 8 g of A will combine with _______ g of B.

A piece of zinc at a temperature of 20oC weighing 65.38 g is dropped into 180 g of boiling water (T=100oC). The specific heat of zinc is 0.4 J g−1 ∘C−1 and that of water is 4.2 J g−1 oC−1. What is the final common temperature reached by both the zinc and water?

Decreasing order of acidic strength of different (-OH) groups is

Total number of α – hydrogens in the given compound is:

Which of the following compounds has the most acidic hydrogen?

The electronic configuration of Ti is 1s2 2s2 2p6 3s2 3p6 3d2 4s2 and it represents

De-Broglie wavelength of an electron travelling with speed equal to 1% of the speed of light is?

Polarization is an important phenomenon which is helpful in determination of covalent nature of compound. With the help of Fajan's rule one can easily predict the nature of compound.The correct increasing covalent nature is:

A Boron mineral have pentaborate anion whose molecular formula is [B5O6(OH)4]−. The number of B−O−B linkage present in one molecule of the mineral are

The correct order of wavelengths of absorption is:

In the gulabjamun experiment that you have seen, which do you think is the adsorbate and which is the adsorbent?

0.2 M solution of formic acid is ionized 3.2%, its ionization constant is

The correct statement(s) regarding defects in solids is / are

Formaldehyde reacts with ammonia to give

Calculate the wavelength of the radiation that would cause photo dissociation of chlorine molecule if the Cl−Cl bond energy is 240 kJ/mol.(take Avogadro's number to be 6×1023, and Planck's constant (h) = 6.6×10−34 J s)

A catalyst is a substance [IIT 1983]

Which of the following reaction will give Hofmann product as major product?

Which of following represent β −hydroxybutyrate− co− β −hydroxy valarate ?

If the speed of electron in first Bohr orbit of hydrogen be ′x′, then speed of the electron in second orbit of He+ is :

Acetophenone on reduction with Zn/Hg in the presence of HCl gives

The free energy of formation of NO is 78 kJ mol−1 at the temperature of 1000 K. What is the equilibrium constant for this reaction at 1000 K?12N2(g)+12O2(g)⇌NO(g)

Which of the following is incorrect for carbene?