Question paper, Acid, Base chemistry, science , SSC

Question paper I           Acid Base Chemistry

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Solve any 15 questions from 1to  18. Each question carry 1 mark. Total 30 marks.

Q.1:-  The characteristic properties of an acid is due to the presence of                

1. hydride ions   2. hydroxyl ions  3. hydronium ions    4. oxide ions

Q.2:-   A strong acid in solution is ___________.

1. mostly molecules   2. mostly ions    3. both molecules & ions

4. less water

Q3:   A weak acid in solution is ___________.

1. mostly molecules     2. mostly ions         3.   both molecules and ions       4. less water

Q.4:-   The pH of a carbonated drink is ___________.

1. less than 7     2. more than 7    3.  equal to 7      4.   approximately 7.8

Q.5:-   An acid is ___________.

1.  a proton donor      2.   a proton acceptor

3.  electron donor       4.   electron acceptor

Q.6:-   The drying of milk of lime (white washing) is due to the action of ___________.

1.  oxygen in air      2.        nitrogen in air

3.  CO2 in air          4.          hydrogen in air

Q.7:-   A salt derived from a strong base and a weak acid will give a salt that is _______.

1.  acidic   2. Basic                     3.  neutral           4.  volatile

Q.8:-   When litmus is added to a solution of borax it turns___________.

1. red   2. Pink              3. remains colourless      4.  blue

Q.9:-   Which of the following is not a mixed salt?

1.  K.Ca.PO4      2. Ca(OCl)Cl     3.           Na.K.CO3      4.        KCl

Q.10:-   Which is a soluble base in water?

1.  Fe(OH)3     2.  Cu(OH)2        3.           Zn(OH)2        4.   NaOH

Q.11:-   Which of the following is a weak base?

1.  NaOH         2.      KOH              3.          NH4OH          4.        Ca(OH)2

Q.12:-   Choose the acid salt from the following:

1.  NaNO3    2.         Na2SO4         3. NaHSO4          4.             Na2CO3

Q.13:-   In the following reaction, identify the products

NaHCo3  + HCl       Þ

1.  sodium chloride and water      2. water and carbon dioxide

3.  sodium carbonate, carbon dioxide and water

4.  sodium chloride, carbon dioxide and water

Q.14:-   Which of the following ionic species exist in a neutralization reaction?

1.  HCl-    2.  H+       3.        H2O         4.   H3O+

Q.15:- When HI dissolves in water, which ions are formed?
a. H₃O⁺ and H₂I⁺       b. H₃O⁺ and I^-         c. H₃O⁺ and OH^-
d. OH^- and H₂I⁺         e. OH^- and I^-
Q.16:-. Which of the following properties would indicate an acid?
I. pH less than 7   II. Turns litmus paper to a blue color.
III. Turns phenolphthalein to a pink color.
a. I only    b. II only     c. I and II    d. I and III          e. II and III
 Q.17:- Which of the following reactions would indicate a base?
a. reacts with water to give H₃O⁺                       b. reacts with water to give H₂
c. reacts with a metal to give H₂                         d. reacts with HCO₃^- to give CO₂
e. reacts with NH₄⁺ to give NH₃
 Q.18:- An electron pair acceptor is:

a.   an acid.      b. a base.    

Q. 19:- Write down properties of  acids & bases. (back to  the page)    5

Q.20:- Write following reactions with one example.(back to the page)         

A.  Acid + Metal   B. Acid + Metal corbonate    C. Acid + Metallic  oxides  D.  Base + Non metallic oxides   E.  Acid + Base                                          5

Sample question paper, Mapping our genes,

 Std: X Biology. Principles of Genetics

Q1. Answers in Short                                                                                     (1 mark / 2 marks each)

1. Who is called the father of Genetics?

2. Define: Chromosome.

3. Which plant did Mendel select?

4. What are the reasons for the success of Mendel’s work?

5. Name the seven pairs of characters used by Mendel in his work

.6. What is Monohybrid ratio?

7. What is Dihybrid ratio?

8. What is law of Dominance?

9. State the law of Segregation.

10. What is law of independent assortment?

11. What is Law of incomplete dominance?

12. Explain multiple Allelism

13. State the difference between Monohybrid and Dihybrid ratio.

14. What is homozygous and heterozygous?

15. What is phenotype and genotype?

16. What is Dominant and Recessive?

17. What are autosomes?

18. What are sex-linked genes? Give example.

19. Name the diseases caused due to X linked genes.

20. Name the disease caused due to Y linked genes.

Q2. Explain Monohybrid ratio with suitable example and figure                                                    (5 marks)

Q3.Explain Dihybrid Ratio with suitable example and figure                                                         (5 marks)

Q4.Explain the Mendel’s law of Genetics with figure and suitable example.                                     (5 marks)

Q5. Explain the exceptions to Mendel’s law.                                                                              (5 marks)

Q6. Explain the importance of Mendel’s Law                                                                             (5 marks)

Q7. Explain Colour blindness / Haemophilia with proper charts.                                            (4 marks each)