CBSE Class 8 Science Synthetic Fibre and Plastics MCQs
Question. Polyester is made of repeating units of chemical called as - (A) Ester (B) Cotton (C) Ether (D) None of these Answer : A Question. Petroleum is the main source of - (A) Silk (B) Plastic (C) Cotton (D) None of these Answer : B…
CBSE Class 9 Science Structure of Atom MCQs
Question: The electronic configuration of the element with atomic number 19 is (A) 2,8,7 (B) 2,9,8 (C) 2,8,8,1 (D) 2,10,7 Answer: C Question: The valence electrons of an element are reponsible for (A) Physical properties of an element (B) Chemical…
CBSE Class 9 Science Periodic Classification of Elements MCQs
PERIODIC CLASSIFICATION OF ELEMENTS Question. Dobereiner, in 1829, pointed out that when elements are arranged in the order of increasing relative atomic masses, in a triad, the relative atomic mass of the middle element was approximatery equal to the mean of…
CBSE Class 9 Science Animal Tissues MCQs
Animal Tissues Question. A tissue is a : (a) group of separate organs that are coordinated in their activities (b) group of similar cells that function together in a specialised activity (c) layer of cells surrounding an organ (d) sheet of cells, one layer…
CBSE Class 9 Science Chemistry MCQs
Question. Name the solute in common salt solution : a) H2O b) NH4Cl c) NaOH d) NaCl Question. Pick out a colloid from the following : Question. Which of the following is property of true solution ? a) Homogeneous b) Heterogeneous c) Translucent d) None of…