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Page 1
.31/3/3. 1 P.T.O.
098C
???? ??.
Roll No.
????
NOTE
(I)
????? ???? ?? ?? ?? ?? ???-?? ?? ?????
???? 23 ?? ?
(I)
Please check that this question
paper contains 23 printed pages.
(II)
???-?? ?? ?????? ??? ?? ???? ??? ?? ????
???? ??? ??? ???-??????? ?? ???-???? ??
???? ?
(II)
Code number given on the right
hand side of the question paper
should be written on the title page
of the answer-book by the
candidate.
(III)
????? ???? ?? ?? ?? ?? ???-?? ?? 30 ???
?? ?
(III)
Please check that this question
paper contains 30 questions.
(IV)
????? ??? ?? ??? ????? ??? ???? ??
????, ??? ?? ????? ???? ???? ?
(IV)
Please write down the Serial
Number of the question in the
answer-book before attempting
it.
(V)
?? ???-?? ??? ???? ?? ??? 15 ???? ??
??? ???? ??? ?? ? ???-?? ?? ????? ??????
?? 10.15 ??? ???? ????? ? 10.15 ??? ??
10.30 ??? ?? ??? ???? ???-?? ??? ?????
???? ?? ???? ?? ?????? ?? ???-??????? ??
????? ??? ??? ?????? ?
(V)
15 minute time has been allotted to
read this question paper. The
question paper will be distributed
at 10.15 a.m. From 10.15 a.m. to
10.30 a.m., the students will read
the question paper only and will not
write any answer on the answer-
book during this period.
?????
SCIENCE
{ZYm©[aV g‘¶ : 3 KÊQ>o A{YH$V‘ A§H$ : 80
Time allowed : 3 hours Maximum Marks : 80
31/3/3
??????? ???? ??? ???-??????? ?? ???-??? ??
???? ???? ?
Candidates must write the Code on
the title page of the answer-book.
SET – 3
Series : JBB/3
???? ??.
Code No.
Page 2
.31/3/3. 1 P.T.O.
098C
???? ??.
Roll No.
????
NOTE
(I)
????? ???? ?? ?? ?? ?? ???-?? ?? ?????
???? 23 ?? ?
(I)
Please check that this question
paper contains 23 printed pages.
(II)
???-?? ?? ?????? ??? ?? ???? ??? ?? ????
???? ??? ??? ???-??????? ?? ???-???? ??
???? ?
(II)
Code number given on the right
hand side of the question paper
should be written on the title page
of the answer-book by the
candidate.
(III)
????? ???? ?? ?? ?? ?? ???-?? ?? 30 ???
?? ?
(III)
Please check that this question
paper contains 30 questions.
(IV)
????? ??? ?? ??? ????? ??? ???? ??
????, ??? ?? ????? ???? ???? ?
(IV)
Please write down the Serial
Number of the question in the
answer-book before attempting
it.
(V)
?? ???-?? ??? ???? ?? ??? 15 ???? ??
??? ???? ??? ?? ? ???-?? ?? ????? ??????
?? 10.15 ??? ???? ????? ? 10.15 ??? ??
10.30 ??? ?? ??? ???? ???-?? ??? ?????
???? ?? ???? ?? ?????? ?? ???-??????? ??
????? ??? ??? ?????? ?
(V)
15 minute time has been allotted to
read this question paper. The
question paper will be distributed
at 10.15 a.m. From 10.15 a.m. to
10.30 a.m., the students will read
the question paper only and will not
write any answer on the answer-
book during this period.
?????
SCIENCE
{ZYm©[aV g‘¶ : 3 KÊQ>o A{YH$V‘ A§H$ : 80
Time allowed : 3 hours Maximum Marks : 80
31/3/3
??????? ???? ??? ???-??????? ?? ???-??? ??
???? ???? ?
Candidates must write the Code on
the title page of the answer-book.
SET – 3
Series : JBB/3
???? ??.
Code No.
.31/3/3. 2
?????? ????? :
????????? ??????? ??? ??? ??????? ?? ???? ???? ???? ???? ????? ?
(i) ???-?? ??? ????? ?? ??????? ???? ??? ?? – ?, ? ??? ? ?
?? ????? ?? ????? ?? ????? 30 ?? ? ??? ??? ??????? ?? ?
(ii) ???-? ?? ??? ??? / ???? ??? (??? ????? 1 ?? 14 ??) ??-?? ??? ?? ?? ? ?? ????? ??
???????? ???, ??? ???-????? ??? ??? ??????-???? ???? ?? ????? ??? ???????
???? ??? ?? ? ?? ????? ?? ??? 1 ??? ???? 1 ???? ?? ??? ???? ????? ?
(iii) ???-? ?? ??? ????? 15 ?? 24 ?? ???????? ???? ?? ??? ?? ? ????? ??? 3 ??? ?? ?? ?
????? ??? ?? ??? ???? 50 ?? 60 ????? ?? ???? ??? ????? ????? ?
(iv) ???-? ?? ??? ????? 25 ?? 30 ?? ???? ????? ???? ?? ??? ?? ? ????? ??? 5 ??? ?? ?? ?
????? ??? ?? ??? ???? 80 ?? 90 ????? ?? ???? ??? ????? ????? ?
(v) ??? ?????? ??? ???????? ????? ????? ???? ??? ?? ??????? ??? ???? ?? ??????? ???? ???? ????
????? ?
(vi) ????? ?? ??? ?? ????? ????? ??? ?? ? ????? ????? ??? ?? ??? ????? ?? ??????? ????? ??? ??
?? ? ???? ????? ?? ?? ???? ?? ?? ????? ?? ??? ????? ?
(vii) ???? ???????, ?????????????, ????? ??? ???? ??? ?? ??? ??????? ????? ??? ?? ?? ?
??? – ?
???? : ??? ????? 1 ???? 2 ?? ??? ??? ??? ??? ?? ?? ????? ?? ??? ?????? (A) ??? ????? ???
???? (R) ???? ????? ???? ??? ?? ? ?? ????? ?? ??? ??? ???? ??? ?? ?????? (a), (b),
(c) ???? (d) ?? ?? ????? ????? ?
(a) (A) ???? (R) ?????? ??? ?? ??? (R) ?????? ?? ??? ?????? ?? ?
(b) (A) ???? (R) ?????? ??? ?? ?? (R) ?????? ?? ??? ?????? ??? ?? ?
(c) (A) ??? ?? ????? (R) ??? ?? ?
(d) (A) ??? ?? ????? (R) ??? ?? ?
Page 3
.31/3/3. 1 P.T.O.
098C
???? ??.
Roll No.
????
NOTE
(I)
????? ???? ?? ?? ?? ?? ???-?? ?? ?????
???? 23 ?? ?
(I)
Please check that this question
paper contains 23 printed pages.
(II)
???-?? ?? ?????? ??? ?? ???? ??? ?? ????
???? ??? ??? ???-??????? ?? ???-???? ??
???? ?
(II)
Code number given on the right
hand side of the question paper
should be written on the title page
of the answer-book by the
candidate.
(III)
????? ???? ?? ?? ?? ?? ???-?? ?? 30 ???
?? ?
(III)
Please check that this question
paper contains 30 questions.
(IV)
????? ??? ?? ??? ????? ??? ???? ??
????, ??? ?? ????? ???? ???? ?
(IV)
Please write down the Serial
Number of the question in the
answer-book before attempting
it.
(V)
?? ???-?? ??? ???? ?? ??? 15 ???? ??
??? ???? ??? ?? ? ???-?? ?? ????? ??????
?? 10.15 ??? ???? ????? ? 10.15 ??? ??
10.30 ??? ?? ??? ???? ???-?? ??? ?????
???? ?? ???? ?? ?????? ?? ???-??????? ??
????? ??? ??? ?????? ?
(V)
15 minute time has been allotted to
read this question paper. The
question paper will be distributed
at 10.15 a.m. From 10.15 a.m. to
10.30 a.m., the students will read
the question paper only and will not
write any answer on the answer-
book during this period.
?????
SCIENCE
{ZYm©[aV g‘¶ : 3 KÊQ>o A{YH$V‘ A§H$ : 80
Time allowed : 3 hours Maximum Marks : 80
31/3/3
??????? ???? ??? ???-??????? ?? ???-??? ??
???? ???? ?
Candidates must write the Code on
the title page of the answer-book.
SET – 3
Series : JBB/3
???? ??.
Code No.
.31/3/3. 2
?????? ????? :
????????? ??????? ??? ??? ??????? ?? ???? ???? ???? ???? ????? ?
(i) ???-?? ??? ????? ?? ??????? ???? ??? ?? – ?, ? ??? ? ?
?? ????? ?? ????? ?? ????? 30 ?? ? ??? ??? ??????? ?? ?
(ii) ???-? ?? ??? ??? / ???? ??? (??? ????? 1 ?? 14 ??) ??-?? ??? ?? ?? ? ?? ????? ??
???????? ???, ??? ???-????? ??? ??? ??????-???? ???? ?? ????? ??? ???????
???? ??? ?? ? ?? ????? ?? ??? 1 ??? ???? 1 ???? ?? ??? ???? ????? ?
(iii) ???-? ?? ??? ????? 15 ?? 24 ?? ???????? ???? ?? ??? ?? ? ????? ??? 3 ??? ?? ?? ?
????? ??? ?? ??? ???? 50 ?? 60 ????? ?? ???? ??? ????? ????? ?
(iv) ???-? ?? ??? ????? 25 ?? 30 ?? ???? ????? ???? ?? ??? ?? ? ????? ??? 5 ??? ?? ?? ?
????? ??? ?? ??? ???? 80 ?? 90 ????? ?? ???? ??? ????? ????? ?
(v) ??? ?????? ??? ???????? ????? ????? ???? ??? ?? ??????? ??? ???? ?? ??????? ???? ???? ????
????? ?
(vi) ????? ?? ??? ?? ????? ????? ??? ?? ? ????? ????? ??? ?? ??? ????? ?? ??????? ????? ??? ??
?? ? ???? ????? ?? ?? ???? ?? ?? ????? ?? ??? ????? ?
(vii) ???? ???????, ?????????????, ????? ??? ???? ??? ?? ??? ??????? ????? ??? ?? ?? ?
??? – ?
???? : ??? ????? 1 ???? 2 ?? ??? ??? ??? ??? ?? ?? ????? ?? ??? ?????? (A) ??? ????? ???
???? (R) ???? ????? ???? ??? ?? ? ?? ????? ?? ??? ??? ???? ??? ?? ?????? (a), (b),
(c) ???? (d) ?? ?? ????? ????? ?
(a) (A) ???? (R) ?????? ??? ?? ??? (R) ?????? ?? ??? ?????? ?? ?
(b) (A) ???? (R) ?????? ??? ?? ?? (R) ?????? ?? ??? ?????? ??? ?? ?
(c) (A) ??? ?? ????? (R) ??? ?? ?
(d) (A) ??? ?? ????? (R) ??? ?? ?
.31/3/3. 3 P.T.O.
General Instructions :
Read the following instructions very carefully and strictly follow them :
(i) The question paper comprises three Sections, A, B and C. There are 30
questions in the question paper. All questions are compulsory.
(ii) Section A – all questions / or parts (question no. 1 to 14) thereof in this
section are one mark questions comprising MCQ, VSA type and
Assertion–Reason type questions. They are to be answered in one word
or in one sentence.
(iii) Section B – question no. 15 to 24 are short answer type questions,
carrying 3 marks each. Answer to these questions should not exceed 50 to
60 words.
(iv) Section C – question no. 25 to 30 are long answer type questions,
carrying 5 marks each. Answer to these questions should not exceed 80 to
90 words.
(v) Answer should be brief and to the point. Also the above mentioned word
limit be adhered to as far as possible.
(vi) There is no overall choice in the question paper. However, an internal
choice has been provided in some questions in each section. Only one of
the choices in such questions have to be attempted.
(vii) In addition to this, separate instructions are given with each section and
question, wherever necessary.
Section – A
Note : For question numbers 1 and 2, two statements are given-one
labelled Assertion (A) and the other labelled Reason (R). Select
the correct answer to these questions from the codes (a), (b), (c)
and (d) as given below :
(a) Both (A) and (R) are true and (R) is correct explanation of the
assertion.
(b) Both (A) and (R) are true but (R) is not the correct explanation of the
assertion.
(c) (A) is true but (R) is false.
(d) (A) is false but (R) is true.
Page 4
.31/3/3. 1 P.T.O.
098C
???? ??.
Roll No.
????
NOTE
(I)
????? ???? ?? ?? ?? ?? ???-?? ?? ?????
???? 23 ?? ?
(I)
Please check that this question
paper contains 23 printed pages.
(II)
???-?? ?? ?????? ??? ?? ???? ??? ?? ????
???? ??? ??? ???-??????? ?? ???-???? ??
???? ?
(II)
Code number given on the right
hand side of the question paper
should be written on the title page
of the answer-book by the
candidate.
(III)
????? ???? ?? ?? ?? ?? ???-?? ?? 30 ???
?? ?
(III)
Please check that this question
paper contains 30 questions.
(IV)
????? ??? ?? ??? ????? ??? ???? ??
????, ??? ?? ????? ???? ???? ?
(IV)
Please write down the Serial
Number of the question in the
answer-book before attempting
it.
(V)
?? ???-?? ??? ???? ?? ??? 15 ???? ??
??? ???? ??? ?? ? ???-?? ?? ????? ??????
?? 10.15 ??? ???? ????? ? 10.15 ??? ??
10.30 ??? ?? ??? ???? ???-?? ??? ?????
???? ?? ???? ?? ?????? ?? ???-??????? ??
????? ??? ??? ?????? ?
(V)
15 minute time has been allotted to
read this question paper. The
question paper will be distributed
at 10.15 a.m. From 10.15 a.m. to
10.30 a.m., the students will read
the question paper only and will not
write any answer on the answer-
book during this period.
?????
SCIENCE
{ZYm©[aV g‘¶ : 3 KÊQ>o A{YH$V‘ A§H$ : 80
Time allowed : 3 hours Maximum Marks : 80
31/3/3
??????? ???? ??? ???-??????? ?? ???-??? ??
???? ???? ?
Candidates must write the Code on
the title page of the answer-book.
SET – 3
Series : JBB/3
???? ??.
Code No.
.31/3/3. 2
?????? ????? :
????????? ??????? ??? ??? ??????? ?? ???? ???? ???? ???? ????? ?
(i) ???-?? ??? ????? ?? ??????? ???? ??? ?? – ?, ? ??? ? ?
?? ????? ?? ????? ?? ????? 30 ?? ? ??? ??? ??????? ?? ?
(ii) ???-? ?? ??? ??? / ???? ??? (??? ????? 1 ?? 14 ??) ??-?? ??? ?? ?? ? ?? ????? ??
???????? ???, ??? ???-????? ??? ??? ??????-???? ???? ?? ????? ??? ???????
???? ??? ?? ? ?? ????? ?? ??? 1 ??? ???? 1 ???? ?? ??? ???? ????? ?
(iii) ???-? ?? ??? ????? 15 ?? 24 ?? ???????? ???? ?? ??? ?? ? ????? ??? 3 ??? ?? ?? ?
????? ??? ?? ??? ???? 50 ?? 60 ????? ?? ???? ??? ????? ????? ?
(iv) ???-? ?? ??? ????? 25 ?? 30 ?? ???? ????? ???? ?? ??? ?? ? ????? ??? 5 ??? ?? ?? ?
????? ??? ?? ??? ???? 80 ?? 90 ????? ?? ???? ??? ????? ????? ?
(v) ??? ?????? ??? ???????? ????? ????? ???? ??? ?? ??????? ??? ???? ?? ??????? ???? ???? ????
????? ?
(vi) ????? ?? ??? ?? ????? ????? ??? ?? ? ????? ????? ??? ?? ??? ????? ?? ??????? ????? ??? ??
?? ? ???? ????? ?? ?? ???? ?? ?? ????? ?? ??? ????? ?
(vii) ???? ???????, ?????????????, ????? ??? ???? ??? ?? ??? ??????? ????? ??? ?? ?? ?
??? – ?
???? : ??? ????? 1 ???? 2 ?? ??? ??? ??? ??? ?? ?? ????? ?? ??? ?????? (A) ??? ????? ???
???? (R) ???? ????? ???? ??? ?? ? ?? ????? ?? ??? ??? ???? ??? ?? ?????? (a), (b),
(c) ???? (d) ?? ?? ????? ????? ?
(a) (A) ???? (R) ?????? ??? ?? ??? (R) ?????? ?? ??? ?????? ?? ?
(b) (A) ???? (R) ?????? ??? ?? ?? (R) ?????? ?? ??? ?????? ??? ?? ?
(c) (A) ??? ?? ????? (R) ??? ?? ?
(d) (A) ??? ?? ????? (R) ??? ?? ?
.31/3/3. 3 P.T.O.
General Instructions :
Read the following instructions very carefully and strictly follow them :
(i) The question paper comprises three Sections, A, B and C. There are 30
questions in the question paper. All questions are compulsory.
(ii) Section A – all questions / or parts (question no. 1 to 14) thereof in this
section are one mark questions comprising MCQ, VSA type and
Assertion–Reason type questions. They are to be answered in one word
or in one sentence.
(iii) Section B – question no. 15 to 24 are short answer type questions,
carrying 3 marks each. Answer to these questions should not exceed 50 to
60 words.
(iv) Section C – question no. 25 to 30 are long answer type questions,
carrying 5 marks each. Answer to these questions should not exceed 80 to
90 words.
(v) Answer should be brief and to the point. Also the above mentioned word
limit be adhered to as far as possible.
(vi) There is no overall choice in the question paper. However, an internal
choice has been provided in some questions in each section. Only one of
the choices in such questions have to be attempted.
(vii) In addition to this, separate instructions are given with each section and
question, wherever necessary.
Section – A
Note : For question numbers 1 and 2, two statements are given-one
labelled Assertion (A) and the other labelled Reason (R). Select
the correct answer to these questions from the codes (a), (b), (c)
and (d) as given below :
(a) Both (A) and (R) are true and (R) is correct explanation of the
assertion.
(b) Both (A) and (R) are true but (R) is not the correct explanation of the
assertion.
(c) (A) is true but (R) is false.
(d) (A) is false but (R) is true.
.31/3/3. 4
1. ?????? (A) : CH
3
OH, CH
3
CH
2
OH ??? CH
3
CH
2
CH
2
OH ??????? ???? ?? ????
?? ?
???? (R) : ???????? ?? ???? ??????, ????? ???? ????????? ???? ????? ?? ????? ?? –CH
2
–
????? ?? ???? ????? ??, ??????? ???? ?????? ?? ? 1
2. ?????? (A) : ????? ????? ???? ????, ???? ????? ???? ???????? ?? ???????? ????????? ??
?????? ???? ???? ?? ?
???? (R) : ???? ?????? ?? ?????????? ???? ????? ???????? ?? ???????? ???? ????? ?? ?????
????????? ?? ????? ??????? ?? ????? ?? ???? ?????? ????? ?? ? 1
3. ????????? ????? ??? ???? ???? ??? ? 1
4. ????? ???????? ?? ??????? ????? ? 1
????
???? ???? ?? ????? ?? ?????? ??????? ???? ?? ??? ?? :
???? ???? ?? ??? ?????? ????? (pm)
Na 86
K 231
Rb 244
Cs 282
??????? ????? ?? ?????? ???? ???? ?? ????? ?? ???? ????? ? 1
Page 5
.31/3/3. 1 P.T.O.
098C
???? ??.
Roll No.
????
NOTE
(I)
????? ???? ?? ?? ?? ?? ???-?? ?? ?????
???? 23 ?? ?
(I)
Please check that this question
paper contains 23 printed pages.
(II)
???-?? ?? ?????? ??? ?? ???? ??? ?? ????
???? ??? ??? ???-??????? ?? ???-???? ??
???? ?
(II)
Code number given on the right
hand side of the question paper
should be written on the title page
of the answer-book by the
candidate.
(III)
????? ???? ?? ?? ?? ?? ???-?? ?? 30 ???
?? ?
(III)
Please check that this question
paper contains 30 questions.
(IV)
????? ??? ?? ??? ????? ??? ???? ??
????, ??? ?? ????? ???? ???? ?
(IV)
Please write down the Serial
Number of the question in the
answer-book before attempting
it.
(V)
?? ???-?? ??? ???? ?? ??? 15 ???? ??
??? ???? ??? ?? ? ???-?? ?? ????? ??????
?? 10.15 ??? ???? ????? ? 10.15 ??? ??
10.30 ??? ?? ??? ???? ???-?? ??? ?????
???? ?? ???? ?? ?????? ?? ???-??????? ??
????? ??? ??? ?????? ?
(V)
15 minute time has been allotted to
read this question paper. The
question paper will be distributed
at 10.15 a.m. From 10.15 a.m. to
10.30 a.m., the students will read
the question paper only and will not
write any answer on the answer-
book during this period.
?????
SCIENCE
{ZYm©[aV g‘¶ : 3 KÊQ>o A{YH$V‘ A§H$ : 80
Time allowed : 3 hours Maximum Marks : 80
31/3/3
??????? ???? ??? ???-??????? ?? ???-??? ??
???? ???? ?
Candidates must write the Code on
the title page of the answer-book.
SET – 3
Series : JBB/3
???? ??.
Code No.
.31/3/3. 2
?????? ????? :
????????? ??????? ??? ??? ??????? ?? ???? ???? ???? ???? ????? ?
(i) ???-?? ??? ????? ?? ??????? ???? ??? ?? – ?, ? ??? ? ?
?? ????? ?? ????? ?? ????? 30 ?? ? ??? ??? ??????? ?? ?
(ii) ???-? ?? ??? ??? / ???? ??? (??? ????? 1 ?? 14 ??) ??-?? ??? ?? ?? ? ?? ????? ??
???????? ???, ??? ???-????? ??? ??? ??????-???? ???? ?? ????? ??? ???????
???? ??? ?? ? ?? ????? ?? ??? 1 ??? ???? 1 ???? ?? ??? ???? ????? ?
(iii) ???-? ?? ??? ????? 15 ?? 24 ?? ???????? ???? ?? ??? ?? ? ????? ??? 3 ??? ?? ?? ?
????? ??? ?? ??? ???? 50 ?? 60 ????? ?? ???? ??? ????? ????? ?
(iv) ???-? ?? ??? ????? 25 ?? 30 ?? ???? ????? ???? ?? ??? ?? ? ????? ??? 5 ??? ?? ?? ?
????? ??? ?? ??? ???? 80 ?? 90 ????? ?? ???? ??? ????? ????? ?
(v) ??? ?????? ??? ???????? ????? ????? ???? ??? ?? ??????? ??? ???? ?? ??????? ???? ???? ????
????? ?
(vi) ????? ?? ??? ?? ????? ????? ??? ?? ? ????? ????? ??? ?? ??? ????? ?? ??????? ????? ??? ??
?? ? ???? ????? ?? ?? ???? ?? ?? ????? ?? ??? ????? ?
(vii) ???? ???????, ?????????????, ????? ??? ???? ??? ?? ??? ??????? ????? ??? ?? ?? ?
??? – ?
???? : ??? ????? 1 ???? 2 ?? ??? ??? ??? ??? ?? ?? ????? ?? ??? ?????? (A) ??? ????? ???
???? (R) ???? ????? ???? ??? ?? ? ?? ????? ?? ??? ??? ???? ??? ?? ?????? (a), (b),
(c) ???? (d) ?? ?? ????? ????? ?
(a) (A) ???? (R) ?????? ??? ?? ??? (R) ?????? ?? ??? ?????? ?? ?
(b) (A) ???? (R) ?????? ??? ?? ?? (R) ?????? ?? ??? ?????? ??? ?? ?
(c) (A) ??? ?? ????? (R) ??? ?? ?
(d) (A) ??? ?? ????? (R) ??? ?? ?
.31/3/3. 3 P.T.O.
General Instructions :
Read the following instructions very carefully and strictly follow them :
(i) The question paper comprises three Sections, A, B and C. There are 30
questions in the question paper. All questions are compulsory.
(ii) Section A – all questions / or parts (question no. 1 to 14) thereof in this
section are one mark questions comprising MCQ, VSA type and
Assertion–Reason type questions. They are to be answered in one word
or in one sentence.
(iii) Section B – question no. 15 to 24 are short answer type questions,
carrying 3 marks each. Answer to these questions should not exceed 50 to
60 words.
(iv) Section C – question no. 25 to 30 are long answer type questions,
carrying 5 marks each. Answer to these questions should not exceed 80 to
90 words.
(v) Answer should be brief and to the point. Also the above mentioned word
limit be adhered to as far as possible.
(vi) There is no overall choice in the question paper. However, an internal
choice has been provided in some questions in each section. Only one of
the choices in such questions have to be attempted.
(vii) In addition to this, separate instructions are given with each section and
question, wherever necessary.
Section – A
Note : For question numbers 1 and 2, two statements are given-one
labelled Assertion (A) and the other labelled Reason (R). Select
the correct answer to these questions from the codes (a), (b), (c)
and (d) as given below :
(a) Both (A) and (R) are true and (R) is correct explanation of the
assertion.
(b) Both (A) and (R) are true but (R) is not the correct explanation of the
assertion.
(c) (A) is true but (R) is false.
(d) (A) is false but (R) is true.
.31/3/3. 4
1. ?????? (A) : CH
3
OH, CH
3
CH
2
OH ??? CH
3
CH
2
CH
2
OH ??????? ???? ?? ????
?? ?
???? (R) : ???????? ?? ???? ??????, ????? ???? ????????? ???? ????? ?? ????? ?? –CH
2
–
????? ?? ???? ????? ??, ??????? ???? ?????? ?? ? 1
2. ?????? (A) : ????? ????? ???? ????, ???? ????? ???? ???????? ?? ???????? ????????? ??
?????? ???? ???? ?? ?
???? (R) : ???? ?????? ?? ?????????? ???? ????? ???????? ?? ???????? ???? ????? ?? ?????
????????? ?? ????? ??????? ?? ????? ?? ???? ?????? ????? ?? ? 1
3. ????????? ????? ??? ???? ???? ??? ? 1
4. ????? ???????? ?? ??????? ????? ? 1
????
???? ???? ?? ????? ?? ?????? ??????? ???? ?? ??? ?? :
???? ???? ?? ??? ?????? ????? (pm)
Na 86
K 231
Rb 244
Cs 282
??????? ????? ?? ?????? ???? ???? ?? ????? ?? ???? ????? ? 1
.31/3/3. 5 P.T.O.
1. Assertion (A) : Following are the members of a homologous series :
CH
3
OH, CH
3
CH
2
OH, CH
3
CH
2
CH
2
OH
Reason (R) : A series of compounds with same functional group but
differing by – CH
2
– unit is called a homologous series. 1
2. Assertion (A) : Alloys are commonly used in electrical heating devices
like electric iron and heater.
Reason (R) : Resistivity of an alloy is generally higher than that of its
constituent metals but the alloys have low melting points then their
constituent metals. 1
3. How are covalent bonds formed ? 1
4. Define electropositivity. 1
OR
The atomic radii of first group elements are given below :
Group-I element Atomic Radii (pm)
Na 86
K 231
Rb 244
Cs 282
State the reason behind the observed trend in the above elements. 1
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FAQs on Class 10 Science: Question Paper for 2020 - Science Class 10
| 1. How can I get the Class 10 Science Question Paper for 2020? |  |
Ans. You can get the Class 10 Science Question Paper for 2020 from various sources. You can check your school's official website or contact your class teacher to provide you with the question paper. Additionally, you can also search for the question paper on educational websites or online platforms that offer study materials for Class 10 Science.
| 2. Is the Class 10 Science Question Paper for 2020 available in multiple languages? | |
Ans. The availability of the Class 10 Science Question Paper for 2020 in multiple languages depends on the respective education board. Some education boards may provide the question paper in multiple languages to cater to students from different linguistic backgrounds. However, it is advisable to check your specific education board's guidelines or contact your school authorities to know the language options available for the question paper.
| 3. Can I find solved answers or solutions for the Class 10 Science Question Paper for 2020? | |
Ans. Yes, you can find solved answers or solutions for the Class 10 Science Question Paper for 2020. Many educational websites, online forums, or study material platforms provide solutions or answer keys for previous years' question papers. You can search for these resources online by specifying the year and subject (Class 10 Science) to find the solved answers or solutions for the question paper.
| 4. Are the questions in the Class 10 Science Question Paper for 2020 the same for all education boards? | |
Ans. No, the questions in the Class 10 Science Question Paper for 2020 may vary for different education boards. Each education board has its own syllabus and question paper pattern. While some common topics may be covered by all boards, the specific questions and their distribution may differ. It is essential to refer to the question paper provided by your respective education board or follow the syllabus prescribed by them to ensure accurate preparation.
| 5. Can I use the Class 10 Science Question Paper for 2020 as a reference for the upcoming exams? | |
Ans. Yes, you can use the Class 10 Science Question Paper for 2020 as a reference for the upcoming exams. It can serve as a valuable resource to understand the question paper pattern, the type of questions asked, and the marking scheme followed by your education board. Analyzing the previous year's question paper can help you identify important topics, enhance your time management skills, and get familiar with the exam format. However, it is advisable to focus on the current year's syllabus and refer to the latest study materials for accurate preparation.
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