Questions 1 to 4 are one mark questions. These are to be answered in one word or one sentence. Section A 1. State the chemical change that takes place when lime stone is heated strongly. 2. .Why do silver articles become black after some time when exposed to air ? 3. Name the device which directly converts solar energy into electrical energy. 4. What are amphoteric oxides ? Choose the amphoteric oxides amongst the following oxides. Na2O, ZnO, Al2O3, CO2, H2O Questions 5 to 13 are two marks questions. These are to be answered in about 30 words each. 5. Draw circuit symbols of the following components : (i) Variable resistance or rheostat (ii) Plug key or switch (closed) 6. What are antacids ? Name two compounds which are used as antacids. 7. A small amount of ferrous sulphate crystals were heated in a hard glass test tube ? (i) Write the equations involved in the above reaction (ii) Name the type of reaction that takes/ place ? 8. A white salt on heating decomposes to give brown fumes and a residue is left behind. (i) Name the salt. (ii) Write the equation for the decomposition reaction. 9. Out of two solar cookers one was covered by a plane glass slab and the other was left open. Which of two solar cookers will be more efficient and why ? 10. A wire of resistance R is cut into three equal parts. (i) Find the value of resistance of each part in terms of the original resistance R ? (ii) If these three pieces are connected in parallel, what is the ratio of the equivalent resistance so obtained with the original resistance ? 11. How does the strength of the Magnetic field at the center of a circular coil of a wire depend on : (a) radius of the coil (b) number of turns in the coil 12. State Ohm’s law and write the condition in which this law is obeyed ? 13. (a) What happens when quick lime is added to water ? (b) Write chemical equation for the above reaction. (c) Which type of reaction is this? Questions 14 to 22 are three marks questions. These are to be answered in about 50 words each Click here to read full paper READ
49 Comments
gaurav kumar
26/4/2013 07:45:14 am
this is a good question but question are only connected of chemistry
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U KNOW
5/9/2013 01:43:11 pm
I AM NOT THAT GOOD IN BIO. Y NO BIO QNS !
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sakshi
16/6/2014 06:09:51 am
so why dont u take coaching to improve it.
hhh
8/9/2014 02:53:18 pm
hhh
sonal
5/5/2013 04:58:18 am
sa 1 important quertion's
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sri
6/6/2013 11:45:10 am
hey it is a good one but......
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jahanvi
15/6/2013 10:00:23 am
Gud question paper
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RENUKA DEVI
31/7/2013 08:32:54 am
GOOD
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LAVANYA
31/7/2013 08:34:23 am
IT IS A VERY GOOD.,BUT IF SOLVED IT WILL BE MORE EASY
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ladli kumari
10/8/2013 02:40:17 am
good ques. but try to give solve questions
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sapna
15/8/2013 05:02:20 am
it is a good one as some ques will match
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sapna
15/8/2013 07:24:39 am
good but solution is not given
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GENIOUS
5/9/2013 01:46:50 pm
WHO SAID ???
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GENIOUS
5/9/2013 01:45:43 pm
I AGREE WITH U MR. VERY BAD QNS
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garry
7/9/2013 01:02:19 am
hi can you send me some impt. questions so that i do my best in exam
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lammy
20/9/2013 04:25:54 am
amazing
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surhit
23/9/2013 10:25:39 am
its very usefull
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jana
24/9/2013 12:54:10 pm
good one but only chemistry is there
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archna
24/9/2013 12:58:40 pm
good question and helpful in exam
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Sheeba
3/4/2014 12:58:19 pm
amazing...
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nandhini
3/4/2014 01:01:47 pm
GOOD
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sanam
29/5/2014 11:31:23 am
why these are not solved . i also wnt solutions
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jharna
30/5/2014 08:41:01 am
Som what good
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16/6/2014 07:27:38 am
its very helpfull during examination........................helps us to know the type of question.....paper
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abhinav
23/7/2014 05:07:25 am
yeh paper bahut hi aacha laga aur aacha hota agar sample paper ki bbadla paper hi open hotato
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anj
25/8/2014 06:41:50 am
ok...solved wil b more preferable
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balu
30/8/2014 04:38:20 am
i think this will help in my science exam
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bipasha
7/9/2014 10:09:34 am
disgusting .............. how is it a cbse question paper...without bio...
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Amulya
8/9/2014 02:58:55 pm
not so.......good or bad without chem
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10/9/2014 04:51:29 pm
it is very good and very standard's paper u should give their answers also so that we will understand much better.
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anonymus
13/9/2014 03:30:08 pm
nice
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Moulik Agrawal
14/9/2014 06:05:03 am
Awesome
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Dan thomas mathew
9/6/2015 12:46:02 pm
not bad
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afrin
6/7/2015 01:40:10 pm
its helpful
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manaswi verma
9/9/2015 11:52:03 am
these ques r good but r only for chemistry this should contain all subjects of science which will surely help me
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Aleena
20/8/2016 09:16:04 pm
Good questions but solutions needed
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