8881 + Interview Questions in Chemistry in Class 10 Page 56 InterviewSolution

2751.	The nitrogen atom of NH_(3) acts as a donor during the formation of a co-ordinate covalent bond while the central nitrogen atom in NO_(2) cannot act as a donor. Explain.
Answer» Solution :The central nitrogen atom of ammonia has lone pair of ELECTRONS on it that can be donated to form co-ordinate COVALENT BOND, which is obvious from the nature of BONDING present in `NH_(3)`. Thus, the central N atom of `NH_(3)` acts as a donor. The central 'N' atom of `NO_(2)` doesn't participate in co-ordinate covalent bond formation due to the lack of lone electron pair on nitrogen. The central 'N' participates in co-ordinate covalent bond formation with oxygen during the formation of `NO_(2)` and thus it cannot further ACT as donor and forms co-ordinate covalent bond with other species that is obvious from the nature of bonding present in `NO_(2)`.

Discussion

2752.	The next homologue of ethyne is (propyne/butyne)
Answer» SOLUTION :PROPYNE

Discussion

2753.	The next homologue of ethene is_____ (propene/butene)
Answer» SOLUTION :PROPENE

Discussion

2754.	The next homologue of ethene is____.
Answer» SOLUTION :PROPENE

Discussion

2755.	The next homologue of C_5H_10 is
Answer» `C_5H_12` `C_4H_8` `C_4H_9` `C_6H_12` ANSWER :D

Discussion

2756.	The new substance produced when two substance react
Answer» SOLUTION :PRODUCT

Discussion

2757.	The neighbouring homologues of carbon compounds differ by- CH_(3).
Answer» SOLUTION :FALSE- They DIFFER by -`CH_(2)`.

Discussion

2758.	The negative sign of the reduction potential indicates that reduction occurs at that electrode when connected to the standard hydrogen electrode.
Answer» ANSWER :TRUE

Discussion

2759.	The negativesignin the rateof a reactionindicates thedecrease in the___________ .
Answer» SOLUTION :CONCENTRATION

Discussion

2760.	The nature of chemical bonding in graphite is
Answer» COVALENT ionic coordinate METALLIC SOLUTION :covalent

Discussion

2761.	The nature of bonding between the atomsin a molecule can be predicted by __________.
Answer» SOLUTION :DIFFERENCE

Discussion

2762.	The nature of an element can be perdicted on the basis of its position in the periodic table.
Answer» ANSWER :T

Discussion

2763.	The name of the compound CH_(3)-CH_(2)-CHO is
Answer» propanal propanone ethanol ethanal Solution :It CONTAINS a total of THREE carbon atoms with an aldehyde GROUP.

Discussion

2764.	The name of the compound CH_3-CH_2COOHis
Answer» BUTANOIC acid ETHANOIC acid propanoic acid muratic acid Answer :C

Discussion

2765.	The movement of some pollen grains in water helps to understand which effect?
Answer» Osmosis Diffusion Brownian Movement All Answer :C

Discussion

2766.	The most reactive metal is present in ______________ block of the periodic table.
Answer» <P>`s-` `p-` `d-` `F-` ANSWER :A

Discussion

2767.	The most reactive metal.
Answer» SOLUTION :FLUORINE (F) .

Discussion

2768.	The most reactive element of all the elements is
Answer» FLUORINE CHLORINE CARBON Hydrogen Answer :A

Discussion

2769.	The most important active step in the development of periodic table was taken by Mendeleev Dalton Avogadro Cavendish.
Answer» Medeleev Dalton Avogadro Cavendish Answer :A

Discussion

2770.	The most electronegative element is
Answer» compound B O N Answer :C

Discussion

2771.	The most electronegative atom .
Answer» SOLUTION :FLUORINE (F) .

Discussion

2772.	The most commonly used alkali for preparation of soap is……………………
Answer» SOLUTION :SODIUM HYDROXIDE

Discussion

2773.	The most commonly used indicator in laboratory is
Answer» METHYL orange Litmus Phenolphtalein Universal indicator Answer :D

Discussion

2774.	The most acidic oxide is
Answer» `Na_(2)O` `Al_(2)O_(3)` `SO_(2)` `NO_(2)` ANSWER :D

Discussion

2775.	The most abundant metal on the earth is
Answer» IRON GOLD aluminium COPPER Answer :C

Discussion

2776.	The most abundant metal in earth's crust is :
Answer» Copper Iron Aluminium Zinc Answer :C

Discussion

2777.	The most abundant element in the universe is
Answer» HELIUM oxygen SILICON HYDROGEN ANSWER :B

Discussion

2778.	The most abundant element in the sun's atmosphere is
Answer» xenon argon HYDROGEN oxygen ANSWER :C

Discussion

2779.	The monomer of Natural Rubber is
Answer» `CH_(2)=UNDERSET(CH_(3))underset(\|)C-CH==CH_(2)` `CH_(2)==overset(Cl)overset(\|)C-CH==CH_(2)` `CH_(2)==CH-CH==CH_(2)` none of these ANSWER :A

Discussion

2780.	The molecules of soap are ......... salts of long chain carboxylic acids.
Answer» SOLUTION :sodium/potassium

Discussion

2781.	The molecules of alkene family are represented by a general formula C_n H_(2n). Write the molecular formulae of lower and higher homologues of an alkene which contains four carbon atoms.
Answer» SOLUTION :LOWER HOMOLOGUE ` = C_3H_6`, and HIGHER homologue=`C_5H_10`

Discussion

2782.	The molecules of alkene family are represented by a general formula C_n H_(2n). What is the molecular formula of the alkene if there are 6 H atoms in it?
Answer» SOLUTION :`C_3H_6`

Discussion

2783.	The molecules of alkene family are represented by a general formula C_n H_(2n). What is the molecular formula and name of the alkene when n = 4
Answer» SOLUTION :`C_4H_8` , BUTENE

Discussion

2784.	The molecules of alkene family are represented by a general formula C_n H_(2n). What is the molecular formula of the first member of the alkene family?
Answer» SOLUTION :`C_2H_4`

Discussion

2785.	The molecules of alkene family are represented by a general formula C_n H_(2n). What is the lowest value which can be assigned to n?
Answer» SOLUTION :LOWEST VALUE of N is 2

Discussion

2786.	The molecules of alkene family are represented by a general formula C_n H_(2n). What do n and 2n signify?
Answer» Solution :n REPRESENTS the NUMBER of CARBON atoms, and 2n represents the number of hydrogen atoms in a molecule of alkene

Discussion

2787.	The moleculescontains morethantwoatomsare called________molecule.
Answer» SOLUTION :POLYATOMIC

Discussion

2788.	The molecule that consists of atoms of different element is called……………… .
Answer» SOLUTION :HETERO ATOMIC MOLECULE

Discussion

2789.	Themoleculethatconsistof atomsof different elements is called_______ molecules.
Answer» SOLUTION :HETERO ATOMIC

Discussion

2790.	The molecule thatconsistof atomsof differentelements are called_____ molecule.
Answer» SOLUTION :heteroatomic

Discussion

2791.	The molecule is madesimilarkindof atomsis called ______.
Answer» SOLUTION :homoatomicmolecule

Discussion

2792.	The moleculeformulaP_(2)O_(5)meansthat:
Answer» A moleculecontains 2atomsofPand5atomsof O The RATIOOF themassof Pto themassof O INTHE moleculeis2:5 Thereare twiceas manyP atomsin themolecule asthereare O atoms The ratioof the massof Pto themassof O inthe MOLECULE is 5 :2 Answer :A

Discussion

2793.	The molecular mass of water (H_2O) is 18. Find the mass of 1GMM of H_2O .
Answer» ANSWER :18G

Discussion

2794.	The molecular mass of water (H_2O) is 18. How many moles of molecules are there in 180g of H_2O ?
Answer» ANSWER :10 MOLES

Discussion

2795.	Themolecular mass of a salt of oxyacid of chlorine of a divalent metal, which contains more number of oxygen atoms than its corresponding -ic' acid is 239. What will be themolecular masses of its (a) phosphate(b) iodide (c ) bisulphate be?
Answer» Solution :The formula of perchlorate of a divalent METAL M is `M(ClO_(4))_(2)`. Molecular mass of `M(ClO_(4))_(2) ` is 239. Let X be the ATOMIC mass ofbivalent metal. `:. X + 2[35.5 + 64] = 239 rArrx = 40` `:.` The element is calcium. (a) The formula of its phosphate is `Ca_(3)(PO_(4))_(2)`. `:.` Its molecular mass is `(3 xx 40)+2[31+64] = 310` (b) The formula of its iodide is `CaI_(2)`. `:.` Its molecular mass is `40+(2 xx 127) = 294` (c ) The formulaof bisulphate is `Ca(HSO_(4))_(2)` `:.` Its molecular mass is ` 40 +2[1+32+64] = 234`

Discussion

2796.	The molecular formula of three fatty acids A, B and C present in oil or fat is C_14 H_29COOH, C_15H_29COOH and C_16H_29COOHWhich of these is derived from i) Alkane ii) Alkene and iii) Alkyne? Which of them becomes rancid earlier? How can we increase its shelf life?
Answer» Solution :DERIVED from i) Alkane - `C_2H_29COOH` II) Alkene - `C_15H_29COOH` III) Alkyne - `C_16H_29COOH ` `C_16H_29COOH ` is unsaturated undergoes RANCIDITY earlier. By hydrogenation we can increase shelf life.

Discussion

2797.	The molecular formula of the first member of a certain group of organic compounds is CH_(2)O (HCHO). Determine the name and the molecular formula of the third member of this group if the members of this group are in homologous series. What is the general name for this group of organic compounds ?
Answer» SOLUTION :`"NAME to "Propanol/Propanaldehyde."` Molecular formula `to C_(3)H_(6)O(C_(2)H_(5)CHO)` Aldehydes

Discussion

2798.	The molecular formula of three carbon compounds which are in homologous series are C_2H_6, C_3H_8, C_4H_10. The suitable general formula for these compounds is
Answer» `C_nH_(2N)` `C_nH_(2n - 1)` `C_n H_(2n - 2)` `C_n H_(2n + 2)` ANSWER :D

Discussion

2799.	The molecular formula of propane is ...........
Answer» SOLUTION :`C_(3)H_(8)`

Discussion

2800.	The molecular formula of formaldehyde is HCHO.
Answer» ANSWER :1

Discussion

Explore topic-wise InterviewSolutions in .

The nitrogen atom of NH_(3) acts as a donor during the formation of a co-ordinate covalent bond while the central nitrogen atom in NO_(2) cannot act as a donor. Explain.

The next homologue of ethyne is (propyne/butyne)

The next homologue of ethene is_____ (propene/butene)

The next homologue of ethene is____.

The next homologue of C_5H_10 is

The new substance produced when two substance react

The neighbouring homologues of carbon compounds differ by- CH_(3).

The negative sign of the reduction potential indicates that reduction occurs at that electrode when connected to the standard hydrogen electrode.

The negativesignin the rateof a reactionindicates thedecrease in the___________ .

The nature of chemical bonding in graphite is

The nature of bonding between the atomsin a molecule can be predicted by __________.

The nature of an element can be perdicted on the basis of its position in the periodic table.

The name of the compound CH_(3)-CH_(2)-CHO is

The name of the compound CH_3-CH_2COOHis

The movement of some pollen grains in water helps to understand which effect?

The most reactive metal is present in ______________ block of the periodic table.

The most reactive metal.

The most reactive element of all the elements is

The most important active step in the development of periodic table was taken by Mendeleev Dalton Avogadro Cavendish.

The most electronegative element is

The most electronegative atom .

The most commonly used alkali for preparation of soap is……………………

The most commonly used indicator in laboratory is

The most acidic oxide is

The most abundant metal on the earth is

The most abundant metal in earth's crust is :

The most abundant element in the universe is

The most abundant element in the sun's atmosphere is

The monomer of Natural Rubber is

The molecules of soap are ......... salts of long chain carboxylic acids.

The molecules of alkene family are represented by a general formula C_n H_(2n). Write the molecular formulae of lower and higher homologues of an alkene which contains four carbon atoms.

The molecules of alkene family are represented by a general formula C_n H_(2n). What is the molecular formula of the alkene if there are 6 H atoms in it?

The molecules of alkene family are represented by a general formula C_n H_(2n). What is the molecular formula and name of the alkene when n = 4

The molecules of alkene family are represented by a general formula C_n H_(2n). What is the molecular formula of the first member of the alkene family?

The molecules of alkene family are represented by a general formula C_n H_(2n). What is the lowest value which can be assigned to n?

The molecules of alkene family are represented by a general formula C_n H_(2n). What do n and 2n signify?

The moleculescontains morethantwoatomsare called________molecule.

The molecule that consists of atoms of different element is called……………… .

Themoleculethatconsistof atomsof different elements is called_______ molecules.

The molecule thatconsistof atomsof differentelements are called_____ molecule.

The molecule is madesimilarkindof atomsis called ______.

The moleculeformulaP_(2)O_(5)meansthat:

The molecular mass of water (H_2O) is 18. Find the mass of 1GMM of H_2O .

The molecular mass of water (H_2O) is 18. How many moles of molecules are there in 180g of H_2O ?

Themolecular mass of a salt of oxyacid of chlorine of a divalent metal, which contains more number of oxygen atoms than its corresponding -ic' acid is 239. What will be themolecular masses of its (a) phosphate(b) iodide (c ) bisulphate be?

The molecular formula of three fatty acids A, B and C present in oil or fat is C_14 H_29COOH, C_15H_29COOH and C_16H_29COOHWhich of these is derived from i) Alkane ii) Alkene and iii) Alkyne? Which of them becomes rancid earlier? How can we increase its shelf life?

The molecular formula of the first member of a certain group of organic compounds is CH_(2)O (HCHO). Determine the name and the molecular formula of the third member of this group if the members of this group are in homologous series. What is the general name for this group of organic compounds ?

The molecular formula of three carbon compounds which are in homologous series are C_2H_6, C_3H_8, C_4H_10. The suitable general formula for these compounds is

The molecular formula of propane is ...........

The molecular formula of formaldehyde is HCHO.