Time to say bye to leather shoes in CBSE schools

CBSE has taken a new decision to protect the environment and animals. It has sent an advisory to all the schools telling them to stop the usage of leather shoes and start using canvas shoes instead.It will be implemented from the next session (2014 - 15).

According to Environmentalist Professor Sunil Choudhary, elements like Zinc, Cadmium, Lead and Iron are used in the manufacture of leather bags and shoes which cause water pollution.

This decision is appreciated by People For Ethical Treatment of Animals (PETA) but the leather industry is somewhat annoyed at

CBSE Class X Science SA2 Question Paper of 2014 with solutions

Downloadable PDF version of the same to be uploaded soon.

Series - HRS

Code No. - 31/1

SUMMATIVE ASSESSMENT - II

SCIENCE

Time allowed : 3 hours

Maximum Marks : 90

General Instructions:
(i) The question paper comprises of two Sections, A and B. You are to attempt both the sections.
(ii) All questions are compulsory.
(iii) All questions of Section A and all questions of Section B are to be attempted separately.
(iv) Question numbers 1 to 3 in Section A are one-mark questions. These are to be answered in one word or in one sentence.
(v) Question numbers 4 to 7 in Section A are two-marks questions. These are to be answered in about 30 words each.
(vi) Question numbers 8 to 19 in Section A are three-marks questions. These are to be answered in about 50 words each.
(vii) Question numbers 20 to 24 in Section A are five-marks questions. These are to be answered in about 70 words each.
(viii) Question numbers 25 to 42 in Section B are multiple choice questions based on practical skills. Each question is a one-mark question. You are to select one most appropriate response out of the four provided to you.

SECTION A

1. List any two properties of the elements belonging to the first group of the modern periodic table.
Ans: (i) They are monovalent.
(ii) They are metals.

2. What is a gene ?
Ans: A gene is a unit of DNA on a chromosome which governs the synthesis of one protein that controls a specific trait of an organism.