(ix) Which of the following is organic fuel
তাৰ কোনটের হল্প -
(a) (C)al (
কলা) (b) Petrol (150)
(c) biogas (গোবৰ গোছ) (d)Nuclear everyty(পাৰমাণবিক শক্তি)
) For real and equally magnified image obtain in concave
mirror, when object is placed in-
বস্তুৰ সমান আৰু, সহ প্রতিবিম্বৰ বাবে অবতল দাপােণত বস্তুৰ স্থান
%)
(a) At centre of curvature (ভজকেন্দ্ৰত)
(b) At focus (169)
(c) In between centre of curvature and focus
(ভাজকেন্দ্ৰ আৰু কাছৰ মাজত)
(d) Beyond centre of curvature
(ভাঁজকেন্দ্ৰৰ বাহিৰত)
2. Balance the following skeletal equations (any two): 2
তৰ জঁকা সমীকৰণ কেইটা সপ্তলন কৰা (যিকোনাে দুটা) ঃ-
(a) KCIO, → KCI + 0,
(b) H+N,» NH,
(C) Fe + H,0 → Fe,0, + H,
3. A solution of a substance 'M' is used for white washing- 2
(1) Name the substance 'M' and write its formula.
(ii) Write the reaction of the substance 'M' named in
(1) above with water.
P.T.0.
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Answer:
a. biogas.............
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