Question

1. What are the indicators? Explain various type of it and what effect of its on acid and base.
2. In a reaction, 5.3 gram of Na2CO3 reacted with 6 gram of CH3COOH. The products were 2.2 grams CO, 0.9 gramas
H2O and 8.2 gram sodium acetate. Show that these observations are in agreement with the law of conservation or mass

3. Hydrogen and oxygen combine in the ratio of 1: 8 by mass to form H20. What mass of Oxygen gas would he
required to react completely with 3 gram of hydrogen gas?
4. Which postulate of Dalton's atomic theory can explain the law of definite proportions?
4. Write the name of the followings: Al, Ar, Ba, B, Br, Ca, C, Cr, Cl, CO, Cu, Fe, F, Au, Ag, H, I, Pb, Mg, Ne, N, O, K. Si. As
Na, S, U, Zn.
5. What are the atomic mass and atomic no. of the followings: H, C, N, P, O, Na, Mg, S, CI, Ca, Li, Ba, Zn, Ag, Au, Mn.
6.Write down the formula of the followings: i) Sodium oxide ii) Aluminium Chloride iii) Sodium sulphate Iv) magnesium Hydroxide. 7.Calculate the no of moles for the followings: i) 52 g He ii) 12.044*10-no of He atoms.
8. if one mole of C items weight 12g, what is the mass (in grams) of litems of carbon?
9 . Which has more no of items, 100 grams of Na* or 100gms of Fe?
10.The Avogadro constant 6.022*10 is defined as the number of atom in 12 gram of carbon. How many numbers of
atoms in 0.5 gram of carbon?
11.If an atom contains one electron and one proton will it carry any charge or not explain your answer.
12. Helium atom has an atomic mass of 44 and 2 proton in its nucleus how many neutrons does it have.
20 Draw atomic structure of first 18 elements.
13 Define atomic number mass number isotope isobar.
14Write electronic configuration of any one pair of isotopes atij isobars.
15. Write the valency electrons of the following elements: chlorine, magnesium, oxygen, Phosphorous, Si, Li, F, Cr, Zn,
Âu, Ag, Co, Cu.
16. Draw a well labeled diagram of compound microscope.
17. How Co2 and H2o move in and out of the celi?
18. Draw 2 diagrams of plant and animal cell?
19.Write short notes on mitochondria, golgi body, ribosome, plastid and its type.
20. Explain plants and animal tissue in details.
21. Draw ray diagram of carbon, N2, O2 cycles,
22. Explain chart of 5 kingdom classification in detail.​

Answer 1

Answer:

indicator at a substance which tell the nature of the substance is it acid or base