National Level Solved Paper (SAT) - 2016-17 - Class 10 MCQ

Abscisic acid is a growth inhibitor hence the combination will show slowest growth.
Abscisic acid causes bud dormancy, it also inhibits seed germination.

Cardiac muscles are involuntary, branched, cylindrical and uninucleated. They have alternate light and dark bands just like skeletal muscles.

Involuntary activities are controlled by mid brain and hind brain. C and D are parts of Hind brain and Mid brain respectively. Mid brain controls certain visual & audio reflexes. Hind brain which includes medulla controls involuntary activities like peristalsis, heart beat, vomiting etc.

Arthropoda involves animal with bilateral symmetry, coelomic cavity, segmented body and jointed appendages. eg. Insects, spiders, prawn etc. Their coelom is filled with blood (haemocoel) arthro mean jointed, poda means appendages.

Spirogyra is an Algae. Where as Penicillium is fungi. Both Nostoc and Bacteria lack well defined nucleus and membrane bound cell organelles hence are prokaryotes.

The given characters in the question match with monocot which does not show secondary vascular tissues, and flower has three sepals. (Flowers are trimerous): Tap roots and presence of 2 cotyledons are the features of dicots. Dicots have reticulate venation.

This is a type of divergent evolution performed by human. Farmers cultivated numerous popular crops from wild cabbage by artificial selection.

Analogous organs are organs with different structure and same function. Wings of bat are skin folds stretched between elongated fingers, wings of bird are a feathery covering all along the arm, wings of a butterfly are covered with scales.

Trichoderma is a fungicide and rest three are biofertilizers. It is used as bicontrol agent against fungal diseases in plants.

Test cross is a cross performed between hybrid of F₁ generation with recessive parent. Test cross is a way to explore the genotype of the organism in question.

Wuchereria brancrofti is a Nematoda which causes Elephantiasis. Staphylococcus bacteria causes Acne.

Pancreatic juice is an universal juice having Trypsin and Lipase. It is released by pancreas. It also conserts of Pancreatic Amylase. Pancreatic  juice works effectively in alkaline medium.

Pteridophyte is a Cryptogamae having motile sperms and dominant generations has diploid cells.

Given time → 120 minutes
Given number of bacteria → 10
Shows divisions after → 20 minutes
So, [20 × 6 = 120 minutes]
Bacteria divides 6 times.
After 120 minutes we have → 640 bacteria [2⁶ × 10]

As valency of metal M is 3 so

As we know that alloys are homogeneous mixture of two or more metals or nonmetals. Hence Brass is a solution as it contains copper and zinc which are uniformly mixed.

As per unitary method
Number of oxygen atoms will be
6/180 x 1.8 = 0.06 NA
∴ In 36.0 gm of water, number of oxygen atoms are
NA/18 x 36 = 2NA
⇒ total number of oxygen atoms
= (0.06 + 2) NA
= 2.06 NA
= 2.06 × 6.022 ×10²³
= 1.2405 × 10²⁴
= 12.405 × 10²⁴

Average atomic mass

The solution of Turmeric solution will become red because of an aqueous solution of CH₃COOK.
[Potassium acetate is basic salt]

X → cuprous sulphide
Y → cuprous oxide

As physical properties and chemical properties of graphite and diamond are different. So statement is incorrect.

As it is clear that upper one is Carboxylic group and lower one is Ester group.

Covalent bond because R & Q both are non metal.

As, 
CH₃COOH + CH₃OH  CH₃COOCH₃ + H₂O
Hence ‘X’ is CH₃COOH or C₂H₄O₂

A → NH₄Cl, B → NH₃
When A reacts with NaOH_[aq],
NH₄Cl + NaOH → NaCl + NH₃ + H₂O 'C'
C → NH₃ (gas)
When C reacts with conc. HCl it forms NH₄Cl.(D)
D → NH₄Cl
When NH₄Cl is shaked well with water, it dissociates to form NH₄OH and HCl.
So E is HCl.
Hence incorrect is that C & E are chemically same.

Reaction is feasible because zinc is more reactive than silver.

BC = Latent Heat of fusion.
DE = Latent Heat of vaporisation.

Uniform positive acceleration from 0 to 1 sec, zero acceleration (uniform velocity) from 1 to 2 sec and uniform negative acceleration from 2 to 3 second.

the person is myopic and the defective for point is → 0.4 m


– ve power indicates concave lens.

t₁ = time of fall
t₂ = time of going up
S₁ = initial height of fall
S₂ = height acquired on going up

= 5m
displacement = 5 – 1.25
 3.75 m