8881 + Interview Questions in Chemistry in Class 10 Page 111 InterviewSolution

5501.	Hitarthi saw her grandmother storing pickles in ceramic pots. She also knew that pickles should not be stored in metal containers. Her friend often brought pickles wrapped in aluminium foil. Hitarthi advised her not to wrap pickles in foil. Why pickles should not be stored in metal containers ?
Answer» Solution :PICKLES reacts with the metals like copper and ALUMINIUM, HENCE, it should not be stored in metal CONTAINERS.

Discussion

5502.	Highest electropositive element in the periodic table is
Answer» Cs Rb K Na Answer :A

Discussion

5503.	HCIis anexampleof ________ molecule .
Answer» SOLUTION :heterodiatomic

Discussion

5504.	Hess' law is a corollary of the first law of thermodynamics.
Answer» ANSWER :1

Discussion

5505.	Here is an electrode reactin : Cu to Cu^(2+)+2e At which electrode (anode or cathode) would such a reaction take place ? Is this an example of oxidation or reduction ?
Answer» SOLUTION :At ANODE , OXIDATION

Discussion

5506.	Hematite is an ore of
Answer» Iron Aluminium Copper Tin Answer :A

Discussion

5507.	Helium, Radon, Argon, Boron
Answer» Solution :BORON: It is a METAL while others are INERT or NOBLEGASES.

Discussion

5508.	Helium is an unreactive gas and neon is a gas of extremely low reactivity. What, if anything, do their atoms have in common?
Answer» SOLUTION :Helium and NEON are noble gases. Both 5 the elements have their outermost SHELLS completely filled. Helium has only K shell which is complete with 2 electrons while neon has two shells, K and L. Both these shells are complete, i.e., K shell has 2 electrons and L shell has 8 electrons.

Discussion

5509.	Helium is an unreactive gas and neon has very poor reactivity. What do these elements have in common?
Answer» SOLUTION :Both helium (He = 2) and neon (Ne = 2, 8) have CLOSED SHELL electronic configuration FREE according to the `2n^(2)` rule.

Discussion

5510.	Helium has the highest ionisation enthalpy.
Answer» ANSWER :TRUE

Discussion

5511.	Heisenberg's uncertainty principal is not applicable to
Answer» all the bodies MOVING with HIGH SPEED protons electrons all the microparticales moving with high speed Answer :A

Discussion

5512.	Height and weight of iron pillar near the Qutub Minar in Delhi are respectively...
Answer» 8 METRE, 6 TONNES 6 metre, 8 tonnes 6 metre, 6 tonnes 8 metre, 8 tonnes Solution :8 metre, 6 tonnes

Discussion

5513.	Heating sodium ethanoate with sosa lime gives
Answer» methane ethane propane ethene Solution :`underset("SODIUM ethanoate")(CH_(3))-underset("Methane")(underset(CH_(4)+Na_(2)CO_(3))underset(darrCaO,"Heat")(COONa+NaOH)`

Discussion

5514.	Heat of neutralisation is less than 13.7 kcal/mol for the reaction
Answer» `HCl + NAOH rarr NACL + H_(2)O` `H_(2)SO_(4) + 2NaOH rarr Na_(2)SO_(4) + 2H_(2)O` `HNO_(3) + NaOH rarr NaNO_(3) + H_(2)O` `CH_(3)COOH + NaOH rarr CH_(3)COONa + H_(2)O` Answer :A

Discussion

5515.	he atomic number of an atom A is x. Valence elec tronic configuration of another atom B is 6s^25d^3 and its atomic number is (x + 5). Write the elec-tronic configuration of A.
Answer» Solution : 's'- orbital is spherically symmetrical and non DIRECTIONAL. Hence, there is no NODAL plane. Only a spherical region adjacent to the orbital where the probability of FINDING an electron is zero is found, which is CALLED nodal region.'p'orbital is dumb bell shaped and directional and lies along the axis. Hence, for each p-orbital, there is one plane where the probability of finding an electron is zero

Discussion

5516.	Why do HCl, HNO_(3), etc., show acidic characters in aqueous solutions while solution of compounds like alcohol and glucose do not show acidic character ?
Answer» SOLUTION :HCl and `HNO_3` produce `H^+` in aqueous solution HENCE they show acidic character. ALCOHOL and glucose do not produce `H^+` in aqueous solution, hence they do not show acidic character.

Discussion

5517.	Harmful materials added to the enviroment are called
Answer» DUST waste sewage polltants ANSWER :D

Discussion

5518.	Hardened steel on heating in the range from 220 to 330^(@)C and on slow cooling gives
Answer» HARD steel BRITTLE steel hard and brittle steel hard and TOUGH steel Answer :D

Discussion

5519.	Hard water limits the cleaning action of soap.
Answer» ANSWER :1

Discussion

5520.	Hard watercontains slats of _________
Answer» CA and MG FE and Ca CU and Fe Cu and Ca ANSWER :A

Discussion

5521.	Hard steel is heated to high temperature and then suddenly cooled in oil. The process is known as
Answer» ANSWER :ANNEALING

Discussion

5522.	Hard soaps are used for cleaning the body.
Answer» SOLUTION :Soft SOAPS are USED for cleaning the body.

Discussion

5523.	Hard glass is prepared by
Answer» fusing a MIXTURE of sodium CARBONATE, calcium carbonate and silica fusing a mixture of POTASSIUM carbonate, calcium carbonate and silica fusing a mixture of potassium carbonate and any oxide none of the above Answer :B

Discussion

5524.	Why group 18elements are called inert gases ? Write the general electronic configuration of group 18 elements.
Answer» Solution :(i) The SECOND last column in the periodic table is group 17 (VII-A) which contains halogens. (ii) The members of this group from top to bottom are as given in the following table: (iii) The valence shell of a halogen contains seven electrons. (iv) Thus, it needs one electron to complete its octet. (v) The halogen complete their octet and ATTAIN the stable inert gas configuration by GAINING one electron. (vi) Hence, the valency of halogens is one, i.e. they are monovalent.(vii) All of them have general formula `X_2`-FLUORINE (`F_2` ) and Chlorine (`Cl_2`) are gases. Bromine (`Br_2`) is a LIQUID, while Iodine (`I_2` ) is a solid.

Discussion

5525.	Halogens means _____________.
Answer» SOLUTION :SALT PRODUCING

Discussion

5526.	Halogens belong to group _____
Answer» ANSWER :17

Discussion

5527.	Halogens are present in which group of the Modern Periodic Table?
Answer» 1ST 12TH 17TH 18th Answer :C

Discussion

5528.	Halgens are placed in which group of elements in modern periodic table?
Answer» 17 2 4 6 Answer :A

Discussion

5529.	H_(2)O, NH_(3), CH_(4) are the examples of homoatomic molecules.
Answer» SOLUTION :Correct STATEMENT : `H_(2)O, NH_(3), CH_(4)` are the EXAMPLES of heteroatomic molecules.

Discussion

5530.	H_(2)(g)+cl_((g))to2HCl_((g)) is a…….
Answer» Deco,POSITION Reaction Combination Reaction Single Displacement Reaction Double Displacement Reaction Solution :It is a combintion reaction between `H_(2)` and `Cl_(2)` to FORM HCl as product.

Discussion

5531.	{:(H_2C-CH_2),("\|\|"),(H_2C-CH_2):} Name the above compound and classify it
Answer» SOLUTION :Cyclobutane-Alicyclic COMPOUND .

Discussion

5532.	[H^(+)] of nitric acid having a pH value of 6 is ____
Answer» ANSWER :0.000001 MOL ion/L

Discussion

5533.	Gypsum is added to cement because
Answer» it makes the cement very HARD it increases the pace of setting of cement it slows down the initial setting of cement when water is added none of the above SOLUTION :GYPSUM is added to cement to increases the pace of setting of cement. The formula of gypsum is `CaSO_(4).2H_(2)O`

Discussion

5534.	Growth of thread like structures along with the gradual spoilage of tomato can be observed when a cut tomato is kept aside for four days. Interpret the causes for this change.
Answer» Solution :The thread like structures that GROW on the tomato are hyphae of Rhizopus (Bread MOULD) They have blob like structures called sporangia Sporangia contain spores, they reproductive structures When spores come into CONTACT with moist surface, they begin to grow Therefore cut tomato gets SPOILED gradually.

Discussion

5535.	Groups
Answer» Solution :The Vertical COLUMNS of ELEMENTS in the PERIODICTABLE are CALLED groups.

Discussion

5536.	Groups and Periods of Modern Periodic Table
Answer» SOLUTION :

Discussion

5537.	Group VII A elements are called as ___________
Answer» SOLUTION :HALOGENS

Discussion

5538.	Group number of carbon family is ………. .
Answer» 13 15 17 14 Answer :D

Discussion

5539.	Group I elements in the Modern Periodic Table are known as
Answer» ALKALI METALS ALKALINE earth-metals HALOGENS NOBLE gases Answer :A

Discussion

5540.	Write True/False :Group-18 contain maximum gaseous elements.
Answer» ANSWER :TRUE

Discussion

5541.	Group 17 : halogens :: Group 18 :____________
Answer» SOLUTION :NOBLE GASES

Discussion

5542.	Group 17 elements are known as Noble gases .
Answer» SOLUTION :FALSE . Group 17 ELEMENTS are known asHalogens .

Discussion

5543.	Group 17 elements are also called as
Answer» ALKALI metals Alkali EARTH metals Halogene Noble gases Answer :D

Discussion

5544.	Group 1,2 and 13-18 are called normal element (or)main group element (or) represenntive elements.
Answer» SOLUTION :N/A

Discussion

5545.	Group 1 is a ___________.
Answer» SOLUTION :ALKALI METALS

Discussion

5546.	Group 1 elements are known as _____
Answer» SOLUTION :ALKALI METALS

Discussion

5547.	Group 1: Alkali metals :: __________ : Alkaline earth metals
Answer» SOLUTION :GROUP 2 - The OUTERMOST shell of these elementshas 2 ELECTRONS, THEREFORE, they are put in group 2.

Discussion

5548.	Ground water gets replenished by rainfall.
Answer» ANSWER :T

Discussion

5549.	Green wooden poles are used during the process of refining of copper. What purpose do they serve?
Answer» Solution :WOODEN POLES are used to agiate molten impure copper. The HEAT of moltal decomposes green wooden poles and methane gas is emitted FORM the poles. This methane reduces cuprous OXIDE to copper.

Discussion

5550.	Graphite is a nonmetal, can it conduct electricity ?
Answer» ANSWER :YES

Discussion

Explore topic-wise InterviewSolutions in .

Hitarthi saw her grandmother storing pickles in ceramic pots. She also knew that pickles should not be stored in metal containers. Her friend often brought pickles wrapped in aluminium foil. Hitarthi advised her not to wrap pickles in foil. Why pickles should not be stored in metal containers ?

Highest electropositive element in the periodic table is

HCIis anexampleof ________ molecule .

Hess' law is a corollary of the first law of thermodynamics.

Here is an electrode reactin : Cu to Cu^(2+)+2e At which electrode (anode or cathode) would such a reaction take place ? Is this an example of oxidation or reduction ?

Hematite is an ore of

Helium, Radon, Argon, Boron

Helium is an unreactive gas and neon is a gas of extremely low reactivity. What, if anything, do their atoms have in common?

Helium is an unreactive gas and neon has very poor reactivity. What do these elements have in common?

Helium has the highest ionisation enthalpy.

Heisenberg's uncertainty principal is not applicable to

Height and weight of iron pillar near the Qutub Minar in Delhi are respectively...

Heating sodium ethanoate with sosa lime gives

Heat of neutralisation is less than 13.7 kcal/mol for the reaction

he atomic number of an atom A is x. Valence elec tronic configuration of another atom B is 6s^25d^3 and its atomic number is (x + 5). Write the elec-tronic configuration of A.

Why do HCl, HNO_(3), etc., show acidic characters in aqueous solutions while solution of compounds like alcohol and glucose do not show acidic character ?

Harmful materials added to the enviroment are called

Hardened steel on heating in the range from 220 to 330^(@)C and on slow cooling gives

Hard water limits the cleaning action of soap.

Hard watercontains slats of _________

Hard steel is heated to high temperature and then suddenly cooled in oil. The process is known as

Hard soaps are used for cleaning the body.

Hard glass is prepared by

Why group 18elements are called inert gases ? Write the general electronic configuration of group 18 elements.

Halogens means _____________.

Halogens belong to group _____

Halogens are present in which group of the Modern Periodic Table?

Halgens are placed in which group of elements in modern periodic table?

H_(2)O, NH_(3), CH_(4) are the examples of homoatomic molecules.

H_(2)(g)+cl_((g))to2HCl_((g)) is a…….

{:(H_2C-CH_2),("||"),(H_2C-CH_2):} Name the above compound and classify it

[H^(+)] of nitric acid having a pH value of 6 is ____

Gypsum is added to cement because

Growth of thread like structures along with the gradual spoilage of tomato can be observed when a cut tomato is kept aside for four days. Interpret the causes for this change.

Groups

Groups and Periods of Modern Periodic Table

Group VII A elements are called as ___________

Group number of carbon family is ………. .

Group I elements in the Modern Periodic Table are known as

Write True/False :Group-18 contain maximum gaseous elements.

Group 17 : halogens :: Group 18 :____________

Group 17 elements are known as Noble gases .

Group 17 elements are also called as

Group 1,2 and 13-18 are called normal element (or)main group element (or) represenntive elements.

Group 1 is a ___________.

Group 1 elements are known as _____

Group 1: Alkali metals :: __________ : Alkaline earth metals

Ground water gets replenished by rainfall.

Green wooden poles are used during the process of refining of copper. What purpose do they serve?

Graphite is a nonmetal, can it conduct electricity ?