8881 + Interview Questions in Chemistry in Class 10 Page 62 InterviewSolution

3051.	Pb_(3)O_(4)+HCl (dil.)overset(warm) to PbCl_(2)darr+Cl_(2)+H_(2)O
Answer» 1 8 3 4 Answer :B

Discussion

3052.	The chipko Movement resists _____
Answer» ANSWER :DEFORESTATION

Discussion

3053.	The Chipko Movement was started in the year ____ in Alakananda valley.
Answer» SOLUTION :POLLUTANTS

Discussion

3054.	The chiefore of copper is Ruby Copper
Answer» SOLUTION :The CHIEF ORE of COPPER is copper PYRITE.

Discussion

3055.	The chief ore of copperis ___________.
Answer» SOLUTION :COPPER PYRITE

Discussion

3056.	The chief ore of Aluminium is ……………. .
Answer» Solution :Bauxite `(Al_(2)O_(3).H_(2)O)`

Discussion

3057.	The chemical used in white washing on the walls is…
Answer» CaO `CaCl_(2)` `CaCOCl_(2)` `Ca(OH)_(2)` ANSWER :A::B::C

Discussion

3058.	The chemical substance present in limewater is
Answer» CALCIUM chloride calcium oxide calcium hydroxide calcium nitrate Answer :C

Discussion

3059.	The chemical reactions which take place with the evolution of heat energy are called endothermic reaction.
Answer» Solution :FLASE Correct statement:The chemical REACTIONS which take place with the evolution of heat energy are CALLED exothermic REACTION.

Discussion

3060.	The chemical properties of the members of each homologous series are similar.
Answer» ANSWER :1

Discussion

3061.	The chemical properties of the elements in the same period are not similar. Reason (R ) : As the electronic configuration changes across the period,the chemical properties of the elements are not similar.
Answer» Both (A) and (R ) are CORRECT , (R ) EXPLAINS the (A) (A) is correct, (R ) is wrong (A) is wrong, (R ) is correct (A) and (R ) are correct, (R ) doesn’t' EXPLAIN (A) Solution :N/A

Discussion

3062.	The chemical properties of organic compounddependson its __________ group .
Answer» SOLUTION :FUNCTIONAL

Discussion

3063.	The chemical name of rust is …………. .
Answer» SOLUTION :HYDRATED FERRIC OXIDE

Discussion

3064.	The chemical name of Baking soda is
Answer» SODIUM carbonate sodium BICARBONATE CALCIUM carbonate sodium hydroxide Answer :B

Discussion

3065.	The chemical formula of plaster of Paris is
Answer» `CaSO_(4). 2H_(2)O` `CuSO_(4).H_(2)O` `CaSO_(4).1/2 H_(2)O` `CaSO_(4)` Answer :C

Discussion

3066.	The chemical formula of marble is……
Answer» `CaCO_(3)` `CaOCl_(2)` `CaSO_(4).(1)/(2)H_(2)O` `Ca(OH)_(2)` ANSWER :A::C

Discussion

3067.	The chemical formula of bleaching powder is
Answer» `CaCI_(2).H_(2)O` CA(OH)CI Ca(OCI)CI `Ca(OCI)_(2)` Answer :C

Discussion

3068.	The chemical formula of a compound does not represent
Answer» the TOTAL number of ATOMS in a molecule of the compound the number of various atoms in one molecule of the compound the STATE of the molecules of the compound the composition of a molecule of the compound SOLUTION :the state of the molecules of the compound

Discussion

3069.	The chemical formula for marble is CaCl_(2)
Answer» Solution :FALSE CORRECT STATEMENT:The chemical formula for marble I `CaCO_(3)`

Discussion

3070.	The chemical equation that represents neutralization reaction among the following is
Answer» `BaCl_(2)+H_(2)SO_(4)rarrBaSO_(4)+2HCl` `MnO_(2)+4HCl rarr MnCl_(2)+2H_(2)O+Cl_(2)` `2NaOH+H_(2)SO_(4)rarr NaSO_(4)+2H_(2)O` `AgNO_(3)+HCl rarrAgCl+HNO_(3)` ANSWER :C

Discussion

3071.	The chemical equation NaSO_(4(eq))+BaCl_(2(aq))toBaSO_(4(s))darr+2NaCl_((aq)) represent which of the following types of reaction?
Answer» Neutralisation Combustion PRECIPITATION Single displacement Solution :This reaction involves the precipitation of WHITE `BaSO_(4)` by MIXING of `NaSO_(4(aq))` and `BaCl_((aq))`.HENCE it belongs to precipitation reaction.

Discussion

3072.	Thechemicalequation Na_(2)SO_(4(aq))to BaSO_(4(g)) +2NaCl_((aq)) represents whichof the followingtypes ofreaction?
Answer» NEUTRALISATION Combustion Precipitaion singledisplacement Answer :C

Discussion

3073.	The chemical change when the solutions of barium chloride and sodium sodium sulphate are mixed is indicated by :
Answer» FORMATION of a WHITE PRECIPITATE evolution of HEAT evolution of a colourless gas rekinding of a GLOWING splinter Answer :A

Discussion

3074.	The chemical bond formed between carbon and bromine is ionic .
Answer» ANSWER :F

Discussion

3075.	The CHEical equation for the manufacture of ammonia is N_2(g)+3H_2(g) to 2NH_3(g) Complete the following: 1 mol N_2+…………..H_(2to)……….NH_3.
Answer» ANSWER :1 MOL `N_2`+3 mol `H_2 to 2` mol `NH_3`

Discussion

3076.	The CHEical equation for the manufacture of ammonia is N_2(g)+3H_2(g) to 2NH_3(g) Calculate the amount of H_2 required to react with 28 g of N_2, completely. [Hint Molecular mass of N_2 = 28, H_2 =2]
Answer» Answer :28 G `N_2` REQUIRES 3 MOL `H_2`3 mol `H_2` = `3times2=6g`

Discussion

3077.	The characteristics of carbon atom by virtue of which it forms four covalent bonds is referred to as catenation.
Answer» Solution :The characteristic of CARBON atom by VIRTUE of which it FORMS four covalent bonds is referred to as TETRAVALENCY of carbon

Discussion

3078.	The change that occurs in the eye to see the distant object clearly is
Answer» focal LENGTH of the EYE lens decreases curvature of the eye lens decreases focal length of the eye lens INCREASES cilary MUSCLES of the eye contract. Answer :C

Discussion

3079.	The cation is ________ and the anion is ________ than the parent atom.
Answer» SMALLER, bigger smaller, smaller bigger, bigger equal, bigger Answer :A

Discussion

3080.	The carbon content in steel is
Answer» `0.1-5.0%` `2.0-2.5%` `0.1-1.5%` LESS than 0.1 Answer :C

Discussion

3081.	The carbon atoms in diamond are bonded to each other by
Answer» ionic bond Coordinate bond HYDROGEN BONDS covalent bonds Solution :In DIAMOND, each carbon atom is tetrahedrally bonded to four other carbon ATOMS by covalent bonds.

Discussion

3082.	The carbon atom has a covalency of :
Answer» 2 4 6 1 Answer :B

Discussion

3083.	The burning of magnesium in air is a
Answer» SYNTHESIS REACTION DECOMPOSITION reaction displacement reaction NEUTRALIZATION reaction ANSWER :A

Discussion

3084.	The buffer solution present in blood is
Answer» `CH_3 COOH + CH_3 COONA` `H_2 CO_3 + NaHCO_3` `NaOH + NaCl` `Al(OH)_3 + AlCl_3` ANSWER :B

Discussion

3085.	The bonding in ammonium chloride
Answer» is covalent only is electrovalent only consistsof THREE covalent nitrogen-hydrogen bonds and an electrovalentbond between the ammonia molecule and the chlorine atom. consist of four covalent nitrogen-hydrogen bonds and one electrovalent bond betweenthe ammoniumion and chloride ION. SOLUTION :`[H-UNDERSET(N)underset(\|)overset(H)overset(\|)N-H]^(+)Cl^(-)` consists of four covalent N-H bonds and one electrovalent bond between `NH_(4)^(+)` and `Cl^(-)` ion.

Discussion

3086.	The bond formed by end on overlap is ______ than the bond formed by side on overlap.
Answer» ANSWER :STRONGER

Discussion

3087.	Explain why the bond angle of H _(2)O is 104 .5^(@) while that of F _(2)O is 102^(@).
Answer» Solution :The BOND PAIR of ELECTRONS are drawn more towards F in `F_(2)O`, whereas in `H_(2)O` it is drawn towards O. So bp – bp REPULSION in `H_(2)O` is greater than that in `F_(2)O`.

Discussion

3088.	The boiling point of water at 1 atmospheric pressure is
Answer» `100^(@)`C `0^(@)`C `100.5^(@)` C `-5^(@)` C ANSWER :A

Discussion

3089.	The boiling point of hydrocarbons increases with increases in the number of carbon atoms.
Answer» ANSWER :1

Discussion

3090.	The Bohar's model could successfully explain
Answer» the stabilty of the ATOM the atomic spectra of hydrozen atom the CALCULATION of ENERGY of the electron in a PARTICULAR orbit of hydrogen atom all of the above ANSWER :D

Discussion

3091.	"The body temperature of frogs and lizards depend on temperature in the environment". Justify.
Answer» Solution :(1) They have three chambered HEARTS. (2) The oxygenated and deoxygenated blood mixes with each other. (3) The energy produced is less which is not SUFFICIENT to maintain constant body temperature. (4) Moreover, they are cold BLOODED animals. (5) The cold blooded animals have TENDENCY to CHANGE the body temperature according to the temperature of environment

Discussion

3092.	The blue colour of copper sulphate starts fading when a zinc rod is dipped in ti. State the reason and write the chemical equation for the reaction involved.
Answer» SOLUTION :ZINC is more REACTIVE than copper, hence zinc displaces copper from its aqueous solution thus decolourizing it. `ZN(s)+CuSO_(4)(aq.)toCu(s)+ZnSO_(4)(aq.)`.

Discussion

3093.	The bleaching action of sulphur dioxide is due to
Answer» OXIDATION evaporation substitution reduction ANSWER :D

Discussion

3094.	The black oxide of copper is _____________
Answer» CUO `Cu_2O` `CuO_2` None Solution :CuO ( COPPER (II) OXIDE )

Discussion

3095.	The best conductingmetal is ____________.
Answer» SOLUTION :SILVER

Discussion

3096.	The behaviourof repetition of a property after a regular interval is calledas ___________.
Answer» SOLUTION :PERIODICITY

Discussion

3097.	The basis of modern periodic law is __________
Answer» ATOMIC NUMBER atomic MASS ISOTOPIC mass number ofneutrons ANSWER :A

Discussion

3098.	The basicity of acetic acid is the same as the basicity of _____
Answer» `HNO_(3)` `H_(2)SO_(4)` `H_(3)PO_(4)` `H_(2)CO_(3)` Solution :Basicity of acetic acid = 1 SINCE it ionises as `CH_(3)COOH rArr CH_(3) COO^(-) + H^(+)` and GIVES only one `H^(+)`ion. `HNO_(3)` also possesses only one REPLACEABLE hydrogen and has basicity =1

Discussion

3099.	The basicity of an acid is defined as
Answer» the number of REPLACEABLE OH-ions the number of `H^+` ions that can be formed from the acid the POWER of the acid to FORM salts none of the above Answer :B

Discussion

3100.	The basic strength of the oxides follows the order
Answer» `Al_2O_3 gt MGO LT Na_2O` `Al_2 O_3 lt MgO lt Na_2O` `Na_2O_3 lt MgO gt Al_3O_2` `Al _2 O_3 gt MgO gt Na_2O` ANSWER :B

Discussion

Explore topic-wise InterviewSolutions in .

Pb_(3)O_(4)+HCl (dil.)overset(warm) to PbCl_(2)darr+Cl_(2)+H_(2)O

The chipko Movement resists _____

The Chipko Movement was started in the year ____ in Alakananda valley.

The chiefore of copper is Ruby Copper

The chief ore of copperis ___________.

The chief ore of Aluminium is ……………. .

The chemical used in white washing on the walls is…

The chemical substance present in limewater is

The chemical reactions which take place with the evolution of heat energy are called endothermic reaction.

The chemical properties of the members of each homologous series are similar.

The chemical properties of the elements in the same period are not similar. Reason (R ) : As the electronic configuration changes across the period,the chemical properties of the elements are not similar.

The chemical properties of organic compounddependson its __________ group .

The chemical name of rust is …………. .

The chemical name of Baking soda is

The chemical formula of plaster of Paris is

The chemical formula of marble is……

The chemical formula of bleaching powder is

The chemical formula of a compound does not represent

The chemical formula for marble is CaCl_(2)

The chemical equation that represents neutralization reaction among the following is

The chemical equation NaSO_(4(eq))+BaCl_(2(aq))toBaSO_(4(s))darr+2NaCl_((aq)) represent which of the following types of reaction?

Thechemicalequation Na_(2)SO_(4(aq))to BaSO_(4(g)) +2NaCl_((aq)) represents whichof the followingtypes ofreaction?

The chemical change when the solutions of barium chloride and sodium sodium sulphate are mixed is indicated by :

The chemical bond formed between carbon and bromine is ionic .

The CHEical equation for the manufacture of ammonia is N_2(g)+3H_2(g) to 2NH_3(g) Complete the following: 1 mol N_2+…………..H_(2to)……….NH_3.

The CHEical equation for the manufacture of ammonia is N_2(g)+3H_2(g) to 2NH_3(g) Calculate the amount of H_2 required to react with 28 g of N_2, completely. [Hint Molecular mass of N_2 = 28, H_2 =2]

The characteristics of carbon atom by virtue of which it forms four covalent bonds is referred to as catenation.

The change that occurs in the eye to see the distant object clearly is

The cation is ________ and the anion is ________ than the parent atom.

The carbon content in steel is

The carbon atoms in diamond are bonded to each other by

The carbon atom has a covalency of :

The burning of magnesium in air is a

The buffer solution present in blood is

The bonding in ammonium chloride

The bond formed by end on overlap is ______ than the bond formed by side on overlap.

Explain why the bond angle of H _(2)O is 104 .5^(@) while that of F _(2)O is 102^(@).

The boiling point of water at 1 atmospheric pressure is

The boiling point of hydrocarbons increases with increases in the number of carbon atoms.

The Bohar's model could successfully explain

"The body temperature of frogs and lizards depend on temperature in the environment". Justify.

The blue colour of copper sulphate starts fading when a zinc rod is dipped in ti. State the reason and write the chemical equation for the reaction involved.

The bleaching action of sulphur dioxide is due to

The black oxide of copper is _____________

The best conductingmetal is ____________.

The behaviourof repetition of a property after a regular interval is calledas ___________.

The basis of modern periodic law is __________

The basicity of acetic acid is the same as the basicity of _____

The basicity of an acid is defined as

The basic strength of the oxides follows the order

The cation is and the anion is than the parent atom.