(Sample Paper) CBSE Class X Summative Assessment-II Science:2011

SAMPLE TEST PAPER

CBSE X Submitted Assessment II: 2011

Subject – Science

Questions
1) Who disproved the vital theory?
(a.) Buck Minsterfuller
(b.) Friedrich wohler
(c.) Tremblay
(d.) Shell

2) To prevent the misuse of alcohol which poisonous substance is added in it?
(a. Methanol
(b.) Ethanol
(c.) Butanol
(d.) Ether

3) Which Substance is used as pickles preservative?
(a.) Ether
(b.) Acetic acid
(c.) Vinegar
(d.) Ethanoic acid

4) Carboxylic acids are called.
(a.) Inorganic Compound
(b.) Organic Compound
(c.) Hydrocarbon Compound
(d.) Acetic acid

5) In modern periodic table how many columns are vertically arranged?
(a.) 16
(b.) 18
(c.) 14
(d.) 20

6) In what way Mendeleev's published his periodic table.
(a.) Radio
(b.) Television
(c.) Magazine
(d.) Newspaper

7) In an experiment to determine the focal length of a convex lens, a student obtained a sharp inverted image of distant tree on the screen behind the lens. He / She then removed the screen and looked through the lens in the direction of object. She / He will see. -
(a.) An inverted image of tree at focus of lens.
(b.) No Image as the screen has been removed
(c.) A blurred image on the wall of laboratory
(d.) An erect image of the tree on the tree on the lens

8) For doing experiment on verifying the Causes of reflection of sound. A student sets up his apparatus as shown. The experiment is more likely is get preformed successfully if the screen shown is a.
(a.) Well polished plane mirror
(b.) Wooden board with many holes in it
(c.) A foam padded board
(d.) A sheet of pure white cloth