Sample paper 10th term-02 Solution by SAROHA CLASSES.pptx

Sample paper 10th term-02 Solution by SAROHA CLASSES.pptx

1. SECTION -A SOLUTION:- P ( Valency =2 ) and R ( Valency = 1) (i) Carbon has a valency of four or Tetravalent (ii) It has Catenation property ( self linking property) sdue to this carbon forms many compounds.

2. SOLUTION:- Y = GROUP 16 ELEMENTS (SULPHUR) HAS VALENCY 2 Z = GROUP 17 ELEMENTS (FLUORINE) HAS VALENCY 1 e.g., Sulfur hexafluoride , SF 6 Disulfur decafluoride , S 2 F 10 Sulfur tetrafluoride , SF 4 Sulfur difluoride , SF 2 Disulfur difluoride , S 2 F 2 Disulfur tetrafluoride ,S 2 F 4 B) W (CALCIUM) IS BIGGER BECAUSE DOWN THE GROUP NO OF SHELLS INCREASES.

3. SOLUTION:- A) 1.VAGINA 2.CERVIX 5.OVARY 3.UTERUS 4.FALLOPIAN TUBE B) Zygote or the fertilized egg cell results from the union of a female gamete (Egg or ovum) with a male gamete (sperm). The number of chromosomes in the gamete is haploid and human gametes contain 23 chromosomes. As zygote is from the fusion of two gametes, the chromosome number is diploid and is double of that in gamete and thus has 46 chromosomes.

4. SOLUTION:- DUE TO BREAD MOULD RHIZOPUS WHICH PRODUCE BY SPORE FORMATION B) HYPHAE OR THREAD LIKE STRUCTURE ARE THE VEGETATIVE PART AND TINY BLOB LIKE STRUCTURES OR SPORANGIA ARE THE REPRODUCTIVE PARTS

5. SOLUTION:- A) IN FIELD A, THE REASON FOR PATERNAL TRAIT IN CONSECUTIVE GENERATIONS OF THE OFFSPRING IS SELF POLLINATION. IN FIELD B, VARIATION IS SEEN TO OCCUR BECAUSE OF RECOMBINATIONS OF GENES AS CROSS-POLLINATION IS TAKING PLACE.

6. OR

7. SOLUTION:- FORCE ON ARM AB WILL ACTS IN DOWNWARD DIRECTION DUE TO ANTICLOCKWISE ROTATION OF COIL. B) BECAUSE BC IS IN THE SAME DIRECTION OF FIELD LINES. FORCE IS MINIMUM WHEN THE DIRECTION OF CURRENT IN THE CONDUCTOR IS SAME AS THAT OF THE MAGNETIC FIELD. BC WILL NOT CONTRIBUTE AS THE FORCE ON THIS PART OF THE COIL WILL BE CANCELLED BY THE FORCE ON DA.

8. RELATIVE CLOSENESS OF FIELD LINES INDICATES THE STRENGTH OF MAGNETIC FIELD. SINCE FIELD LINES ARE CLOSED AROUND THE ENDS OF SOLENOID, HENCE THESE ARE THE REGIONS OF STRONGEST MAGNETISM. B) THE DIRECTION OF THE MAGNETIC FIELD WILL ALSO BE REVERSED. SOLUTION:-

9. SOLUTION:-

10. SOLUTION:-

11. SOLUTION:- SECTION:-B

12. SOLUTION:- A) FOUR B) C 4 H 8 and C 5 H 10 are homologous as they differ in –CH 2 , Differ in molecular mass Same functional group and same general formula C C C C H H H H H H H H H H H H H

13. OR A) ELECTRON DOT STRUCTURE OF ETHANOL B) CH 3 OH and C 3 H 7 OH are homologues of ethanol

14. ROUND GREEN: 30 WRINKLED YELLOW :30 NEW COMBINATIONS ARE PRODUCED BECAUSE OF THE INDEPENDENT INHERITANCE OF SEED SHAPE AND SEED COLOUR TRAIT.

15. SECTION:-C