Explore topic-wise InterviewSolutions in Current Affairs.

1)Hydrogen -H

Carbon-C

2)Gold,SILVER,iron,etc

3)Helium-He

Neon-Ne

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Answer:

Electrochemical series also sometimes referred to as ACTIVITY series is a LIST that describes the arrangement of elements in order of their increasing ELECTRODE potential values. The series has been established by measuring the potential of various electrodes versus STANDARD hydrogen electrode .

ANSWER:

SORRY I don't KNOW the answer

HENCE, K.E. will INCREASE by 9 TIMES if it's SPEED is tripled.

ANSWER:

This is your answer: EPITHELIAL TISSUE

Explanation:

Rennet : ALIMENTARY CANAL of CATTLE : : Protease inhibitors ....

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ANSWER:

to filter the inhaled AIR before GOING to the LUNGS

MENDEL followed the inheritance of 7 TRAITS in pea PLANTS, and each TRAIT had 2 forms. He identified pure-breeding pea plants that consistently showed 1 form of a trait after generations of self-pollination. ... He found that all of the first-generation (F1) hybrids looked like 1 of the parent plants.

Explanation:

The melting point (or, rarely, liquefaction point) of a substance is the temperature at which it changes state from solid to liquid. At the melting point the solid and liquid phase exist in EQUILIBRIUM. The melting point of a substance depends on pressure and is usually specified at a standard pressure such as 1 ATMOSPHERE or 100 kPa.

Ice cubes put in water will start to melt when they reach their melting point of 0°C

When considered as the temperature of the reverse change from liquid to solid, it is referred to as the freezing point or crystallization point. Because of the ability of substances to supercool, the freezing point can easily appear to be below its actual value. When the "characteristic freezing point" of a substance is determined, in fact the actual methodology is ALMOST always "the principle of OBSERVING the disappearance rather than the formation of ice, that is, the melting point.[1]

ANSWER:

HONEY is homogeneous I THINK cause it's proportion is constant and SHOW TYNDALL effect therefore

Explanation:

Q. Explain why a ray of light passing through the centre of curvature of concave minor gets reflected along the same path.

Ans.

The light falling on the centre of curvature is reflected back along the same path because the incident ray falls on the mirror along the normal to the reflecting surface.

Q. What is the important function of presence of ozone in earth’s atmosphere?

Ans.

Ozone is the Earth’s natural process for all life forms. It shields our planet from the UV radiations, as these ultraviolet rays are harmful for all the living things. Therefore, any change in the size of this layer will AUTOMATICALLY affect the life of people, plants and animals living on earth.

Q. Dark reaction of photosynthesis does not need light. Do plants undergo dark reaction at night? Explain.

Ans.

Dark reaction does not mean that it occurs in the absence of light i.e., at night. Infact, it is the reaction occurring simultaneously with light reaction. It a chemical process occurring independent of light. This reaction is completely BASED on enzymes.

Q. How are we able to see distant and nearby objects clearly? Which part of eye helps in changing curvature of lens? Why no image is formed at blind spot?

Ans.

We can see distant and near objects clearly because of the property of accommodation of eye. Accommodation is the name given to the ability of the lens of the eye to change its focal length and produce focused images of both distant and near objects on the retina.

Ciliary muscle helps in changing curvature of the lens. They are attached to the lens and contract or release to change the lens shape and curvature.

No image is formed at blind spot because there are no photo receptors, i.e., cones and rods to detect the light and send it to brain.

Q. (a) Which property of carbon leads to formation of large number of compounds? Define it.

(b) What is the functional group in the following molecules?

(i) CH3CH2CH2OH

(ii) CH3COOH

Ans.

(a) The two features of carbon that give rise to a large number of compounds are as follows:

(i) Catenation: It is the ability to form bonds with other atoms of carbon.

(ii) Tetravalency: With the valency of four, carbon is capable of bonding with four other atoms.

(b)

Compound

Functional group

(i) CH3CH2CH2OH

-OH (Hydroxyl group)

(ii) CH3COOH

-COOH (Carboxyl group)

Q. (a) Why magnification is taken negative for REAL images and positive for virtual images?

(b) Why convex mirror is used in rear VIEW mirrors and not concave mirror?

Ans.

(a) If image is real, it will be inverted which means height of image will be taken as negative. Also, the height of object is always positive.

Now as magnification = Height of image / Height of object.

Therefore, in case of real image,

Magnification = Height of image (-) / height of object (+)=Negative.

So, Magnification will be negative.

Similarly, if image is virtual, it will be erect.

Therefore, in case of virtual image,

Magnification = Height of image (+) / height of object (+)= Positive

So, Magnification will be positive.

(b) Convex mirror is commonly used in rear view mirrors in vehicles because it gives an erect, virtual, full size diminished image of distant objects with a wider field of view. Thus, convex mirrors enable the driver to view much larger area which is not possible with a concave mirror.

Important Long Answer Type Questions

Get here a collection of long answer type questions to be prepared for the 5 marks answer type questions:

Question numbers 25-30 in Section-C of Class 10 Science paper will be asked for 5 marks each. These are to be ANSWERED in 80-90 words each.

Important Long Answer Type Questions for CBSE Class 10 Science Exam, are:

Q. (a) What are ‘magnetic field lines’? How is the direction of a magnetic field at a point determined ?

(b) Draw two field lines around a bar magnet along its length on its two sides and mark the field directions on them by arrow marks.

Ans.

(a) The magnetic field lines are the pictorial representation of the strength and direction of the magnetic field.

The direction of the magnetic field at a point can be found by placing a small magnetic compass at that point. The north end of the needle of a compass indicates the direction of magnetic field at a point where it is placed.

(b) Magnetic field lines of a bar magnet emerge from the north pole and terminate at the south pole. Inside the magnet, the field lines emerge from the south pole and terminate at the north pole, as shown in the given figure.

magnetic field lines

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EXPLANATION:

the invisible gaseous substance surrounding the EARTH, a MIXTURE mainly of oxygen and nitrogen

CONSUMERS are protected by the CONSUMER Bill of RIGHTS. The bill states that consumers have the right to be informed, the right to choose, the right to SAFETY, the right to be heard, the right to have problems corrected, the right to consumer education, and the right to service.

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Answer:

I do

Explanation:

It was a large lovely garden, with soft green grass. Here and there over the

grass stood beautiful flowers like stars, and there were twelve peach trees

that in the spring-time BROKE out into delicate blossoms of PINK and pearl, and

in the autumn bore rich fruit. The birds sat on the trees and sang so sweetly

that the children USED to stop their games in order to listen to them. ‘ How

happy we are here!’ they cried to each other.

One DAY the Giant came back. He had been to visit his friend the Cornish

Ogre, and had stayed with him for seven years. After the seven years were

over he had said all that he had to say, for his conversation was limited, and

he determined to return to his own CASTLE. When he arrived he saw the

children playing in the garden.‘What are you doing?’ he cried in a very gruff

voice, and the children ran away. ‘ My own garden is my own garden,’ said

the Giant; ‘ anyone can understand that, and I will allow nobody to play in it

but myself.’ So he built a high wall around it, and put up a notice board:

1:Which words of the Giant bring out his selfishness ?

Answer ⤵️

Economic approach

In particular, economics PROVIDES a model for the sustainable use of renewable natural resources in the form of MANAGEMENT tools, such as taxes, quotas, GRANTS, SUBSIDIES, standards, licences, permits, property rights, and market rights.

Explanation:

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Answer:

The supercontinent began to break apart about 200 MILLION years ago, during the EARLY Jurassic EPOCH (201 million to 174 million years ago), eventually forming the modern continents and the Atlantic and INDIAN oceans.

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Answer:

yess

Explanation:

Most nitrogenous waste in marine fishes appears to be secreted by the gills as AMMONIA. Marine fishes can EXCRETE SALT by CLUSTERS of special cells (CHLORIDE cells) in the gills.

ANSWER:

Acrylic fabric is lightweight, warm, and soft to the touch. It is THUS used in place of wool or blended with sheep wool or cashmere. Common end products of acrylic fabric INCLUDE sweaters, HATS, socks, and knitting yarn. Like polyester and NYLON, acrylic fabric is hydrophobic – meaning it repels water

ANSWER:

A silkworm is a CATERPILLAR. We can MAKE silk using this worm.

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Answer:

a) Explain why a cricket player lowers his hand while catching a ball.

A cricket player lowers his hand while catching a ball to increase the time in which ball is caught. As times increases, the rate of change of momentum decreases, and the force ACTING on the HANDS is reduced.

b) Explain why a gun recoil when it is fired.

Before firing, both gun as well as bullet is at REST. Therefore, momentum of system is zero. As soon as a bullet is fired, it moves in FORWARD direction. According to the law of CONSERVATION of momentum, total momentum of system remains conserved in tyhe absence of external force. So, momentum of gun and bullet after fire should remain zero. This is possible if and only if gun moves in backward direction.

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ANSWER:

THANK gahajjsksbnsxsbzn

ANSWER:

All pure numbers are dimensionless quantities, for EXAMPLE 1, i, π, e, and φ. UNITS of NUMBER such as the dozen, gross, googol, and Avogadro's number may ALSO be considered dimensionless.

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★ here is your answer......

Rolling FRICTION is LESS than the sliding friction.

Rolling friction is the resistance to motion experienced by a BODY when it rolls UPON another. It is much less than sliding friction for same pair of bodies. When one body rolls upon another, there is theoretically no sliding or slip between them. And if both are PERFECTLY rigid, there is no surface of contact. If there is no surface contact then the friction is very less.

ANSWER:

क्रियाकलाप 1.7 में एक परखनली में एकत्रित गैस की मात्रा दूसरी से दोगुनी इसलिए है क्योंकि जल के विद्युत अपघटन में हाइड्रोजन तथा ऑक्सीजन 2 : 1 की मात्रा में प्राप्त होती है।

Answer :- PEACOCK is our NATIONAL BIRD

ANSWER:

grvrggrerbrhrhhrhrrhheruru

Answer:

pH paper green

Explanation:

When pH paper is DIPPED into a SOLUTION it turns a certain color depending upon the acidity or alkalinity. Water has a neutral pH of AROUND 7 and turns pH paper green. Acidic SOLUTIONS turn pH paper red and alkaline solutions lead to a purple color.

Explanation:

Aluminum PHOSPHIDE (ALP) is a cheap, effective and commonly used pesticide. However, unfortunately, it is now one of the most common causes of poisoning among agricultural pesticides. It liberates lethal phosphine gas when it COMES in contact EITHER with atmospheric moisture or with hydrochloric acid in the STOMACH

Four MAJOR adaptations are found in all TERRESTRIAL plants: the alternation of generations, a SPORANGIUM in which the spores are formed, a gametangium that PRODUCES haploid cells, and apical meristem tissue in ROOTS and shoots.

ANSWER:

do not BELONGS , MAY be the CORRECT answer

ANSWER:

C) yeast

Explanation:

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Answer:

and and and ANDROID MOVIES to be late GULA pora di6e re the day of the day of the day of the day of the day of the day of the RECENT past

Magnets attract IRON due to the influence of their magnetic field upon the iron.

Because in PERIODIC table the ELEMENTS are arranged in a increasing order of their atomic no. due to which many of the defects in Mendeleev's classification is rectified.

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Are u TEJAS or _____???

EXPLANATION:

It is to be remembered that a convex MIRROR always forms the virtual, erect and diminished image.

Given: Object distance, u=−10cm     Focal length, f=15cm

To find: Image distance, v

From mirror formula :

v1+u1=f1

v1−101=151

v1=151+101=15025

v=6cm

Hence image will be formed 6 cm BEYOND the mirror, i.e virtual magnification

m=u−v=−10−6=0.6

Hence it will be erect and diminis

ANSWER:

देश के जल संसाधनों को नदियों और नहरों, जलाशयों, कुंडों और तलाबों, आर्द्र भूमि और चापाकार झीलों तथा शुष्क पड़ते जलस्रोतों और खारे पानी के रुप में वर्गीकृत किया जा सकता है। नदियों और नहरों के अलावा बाकी के जल स्रोतों का कुल क्षेत्र 7 मिलियन हेक्टेयर है

Explanation:

ANSWER:

In the DARK reaction, PLANTS use carbon dioxide with ATP and NADPH from the light REACTIONS

Answer:

Because Carbon dioxide is only about 0 . ... Though carbon dioxide is HEAVIER than air, but it has a tendency to mix with other gases of air and since the rest gases are found at HIGHER ALTITUDE so the carbon dioxide could not be able to be in the lower layer of ATMOSPHERIC air.

Explanation:

At temperatures below 32°F (0°C), LIQUID water FREEZES; 32°F (0°C) is the freezing POINT of water.

ANSWER:

FILTER paper

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Answer:

A STEAM engine CONVERTS the heat energy of steam into mechanical energy. A turbine converts the KINETIC energy of a STREAM of GAS or liquid into mechanical energy

When a body is TAKEN from EQUATOR to POLES, its WEIGHT increases.

ANSWER:

hidden STATE is true electric CHARGE

Answer:

A COMMON definition of community emerged as a group of PEOPLE with diverse characteristics who are linked by social ties, share common perspectives, and engage in JOINT action in GEOGRAPHICAL locations or SETTINGS.

Answer:

plz be smile

Explanation:

The English love a good laugh. They are known to be sarcastic and to laugh at themselves – why not? LAUGHTER and very funny jokes in English are the best MEDICINE, after all! It can be tricky to get the English HUMOUR at first because it concerns a lot of SILLINESS and SARCASM, but we’ve got you sorted. We’ve compiled the top ten English jokes, so if you are in the UK you won’t feel lost or you might even crack a joke one day.

Explanation:

Haemoglobin is the RESPIRATORY pigment that TRANSPORTS OXYGEN to the body cells for cellular respiration. Therefore, deficiency of haemoglobin in blood can affect the oxygen SUPPLYING capacity of blood. This can LEAD to deficiency of oxygen in the body cells. It can also lead to a disease called anaemia.

ANSWER:

The electrons of smaller orbitals exist closer to the NUCLEUS than the electrons of larger orbitals do. ... The greater the attractive FORCE between the protons and the electron, the greater the STABILITY of the electron. Therefore the electrons in He 1S are more stable than the electrons in He 2s.

Explanation:

ANSWER:

STARCH...,.........

Answer:

1×12+4×1

=16u

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Answer:

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